For most high earners there is a persistent, structural frustration: however hard the salary is worked for, the finish line does not get closer. That is not a motivational problem. Earned income is taxed the moment it is generated, and it cannot compound.
Picture an iceberg. The visible tenth is the world of salaries, hustle and heavy withholding. The nine tenths under the water is asset ownership, and it operates under a different set of rules. Not secret rules. Published ones, most of them decades old. What follows is how three of them combine into the framework usually called Buy, Borrow, Die.
This is a description of how the mechanism works. It is not advice, and nothing here should be read as a recommendation to do any of it.
The gap the framework sits inside
Thomas Piketty’s 2014 Capital in the Twenty-First Century popularised the shorthand for why the gap widens: r > g.
- r is the return on capital: stocks, real estate, land. Piketty puts the historical range at roughly 4% to 8%.
- g is the growth of the broader economy, which is what sets wages. That typically runs 1% to 3%.
When the return on owning consistently beats the growth of earning, owners pull away from earners as a matter of arithmetic rather than effort.
Tax treatment widens the same gap from the other side. Tax Policy Center figures put combined top marginal rates on wages above 40% once federal, state and payroll taxes are stacked, while dividends and realised capital gains sit below 25%. Labour income carries the heaviest burden of any income category and is the only one taxed on generation rather than on sale.
Buy: the realisation principle
The first pillar is the oldest and least controversial. Under the tax code, wealth is not taxed because an asset went up. A taxable event happens when the asset is sold.
- Unrealised gain. A holding rises from $100 to $200. Untaxed, for as long as it is held.
- Realised gain. The holding is sold. That triggers the liability.
The usual defence of this is practical rather than ideological: taxing paper gains would force founders and investors to sell shares every year to pay the bill, diluting control and draining liquidity out of the companies. Whatever you make of that argument, the consequence is the same. The rational move for someone building wealth is to acquire assets that appreciate quietly, without the annual friction of a tax event.
Borrow: turning assets into cash without selling
Holding rather than selling creates one obvious problem. Assets do not pay for groceries. The instrument that solves it is a securities-backed line of credit, an SBLOC: a loan with the portfolio pledged as collateral.
FINRA’s own investor material makes the appeal explicit, and it is the whole point of the structure: an SBLOC gets you cash without selling the securities, so it does not create a capital gains event.
Here is the shape of it, worked through with round numbers. These figures are an illustration, not measured data. They are chosen to be legible, not to describe any real portfolio.
Take a $10,000,000 portfolio, and a need for $1,000,000 in cash.
- Selling to raise it triggers a capital gains bill. At a 20% rate that is $200,000 gone.
- Borrowing against it at 5% costs $50,000 a year in interest, and the tax bill is zero, because loan proceeds are debt rather than income.
- Meanwhile the portfolio is still invested. At 8% growth it gains $800,000, which covers the $50,000 of interest with $750,000 left over.
The spread between what the debt costs and what the retained asset earns is the entire engine. It works only while that spread holds, which matters later.
Die: the section 1014 reset
The framework closes with 26 U.S. Code § 1014, the step-up in basis.
When the owner dies, the tax basis of the inherited asset resets. It is no longer what the deceased paid. It becomes the fair market value at the date of death.
Follow one holding through. Bought for $1,000,000. Worth $10,000,000 at death. The heirs inherit it with a basis of $10,000,000, not $1,000,000. They can sell at that valuation and realise no taxable gain at all, and use the proceeds to clear the SBLOC borrowing the deceased lived on.
Nine million dollars of appreciation, accumulated across a lifetime, leaves the tax ledger permanently. That is not an exploit of the rule. That is the rule operating as written.
The argument about what rate this actually amounts to
This is where the public argument gets heated, and most of the heat comes from two different denominators being compared as if they were the same measurement.
ProPublica’s 2021 Secret IRS Files reporting calculated a true tax rate: tax paid divided by growth in wealth. On that basis it reported 0.10% for Warren Buffett and 0.98% for Jeff Bezos, and about 3.4% across the twenty-five richest Americans.
Tax Policy Center measures the conventional thing: tax paid divided by taxable income. On that basis the top 0.1% pay an effective federal rate of about 30.6% and the bottom 20% about 2.9%.
Both numbers are correctly calculated. They are answers to different questions. ProPublica’s denominator, wealth growth, is deliberately non-standard, and the point of using it was to make visible exactly the gains that the realisation principle keeps outside the tax system. Quoting either figure without naming its denominator is how this argument stays unproductive.
The part that is usually left out
None of this is a free lunch, and the risk sits in the borrowing.
An SBLOC is a demand loan. The lender can call it. If the pledged portfolio falls sharply in a market drop, the borrower gets a margin call, and if fresh collateral cannot be produced immediately the lender sells the assets at the worst available prices.
That forced sale triggers precisely the capital gains tax the structure existed to defer, and it arrives during a liquidity crisis rather than at a moment of the owner’s choosing. The strategy is a bet that the spread between borrowing cost and asset growth holds. When it stops holding, it unwinds fastest for whoever leaned on it hardest.
What the framework is, stripped of the mystique
Three ordinary provisions, interacting:
- No tax on gains until they are realised.
- No tax on borrowed money, because debt is not income.
- A reset of basis to market value at death.
Each is defensible on its own terms and none was written with this sequence in mind. Read together they describe a system that taxes time heavily and taxes ownership lightly, which is a statement about the tax code rather than about anyone’s character.
The question that leaves is whether a system that taxes labour on generation and capital on sale can hold, or whether the migration toward ownership is simply the rational response to rules that already exist.
Stay & Analyze — Or Join Them.
