alt Hacker NewsIf I have X dollars and get taxed such that I have X * T after the taxing, say T = (1 - .20), then I invest and that money grows by a factor, say G = (1 + .50), over the years, then in the mean time inflation hits and reduces my money by a factor, say I = (1 - .10), so that what I end up with in the end is F = X * G * T * I. If instead I invested and grew and inflated and then got taxed, X * G * I * T, it would be exactly the same. Multiplication is commutative.
What you are doing by delaying taxes is hoping you have a lower rate later. Say you make less in retirement or die untaxed and your kids get a step up in basis. But without a change in rate (which might go up even), there’s no difference.
If you take a loan against your larger capital pool, inflation helps you (to the extent it wasn't incorporated in higher lending costs).
But yeah that's a second order effect. There aren't really any scenarios where you have a fixed nominal tax that can be deferred without locking up the money, so I think you're mostly right that it comes back to lower tax rate and step-up.