Nice analysis. I don't see things like this often. And yes I have thought about doing similar myself.

Your piece misses two factors:

- Any gains on investment will need to be taxed, either short term or long term capital gains. Unless you deposit everything into tax-deferred accounts.

- Social Security may end up not being solvent later, especially as increasing #'s of boomers are taking back out of the system. Reduced payments, and almost certainly older future age qualification brackets, are risks to the "guarantee" of social security.