Thread hijack… Are there really that many variables that w-2s wage slaves can really play, beyond just the standard pretax deductions, maximizing capital gains treatment, home tax and mortgage deductions?

Start a business on the side. Use part of your home for a home office. Open an HSA. Go green.

Lots you can do but like others mentioned it takes some work and most W2 wage slaves don't want to know or think about it.