You're overestimating on a few things, but also missing a few things.
The top marginal theft rate only kicks in over a couple hundred thousand. So on a million in income, you are only paying the 40% on 750k or so, with the rest at the graduated lower rates. There are upper limits to (at least some of) the self employment theft. I don't know about all of it, but for at lease the SS part of the FICA theft, it is only applied to the first 115k of income.
But your leaving out sales tax, gas tax, property tax, and govt occupation licences and fees.
So yes, the theft rate would be about 650k factoring everything.