> Similarly, I might be receiving Social Security or Medicare benefits.

The demographic here is likely to be benefitting most from the mortgage interest deduction and 401k contribution "deduction" (it's deducted before pay is reported, but mathematically it's the same thing), FWIW. Younger folks are probably still paying well under market rate on their guaranteed student loans, and older FAANG scions are very much helped by the very low long term capital gains rate too.