[pseudalopex]

Part of the point is they don't have to do anything nefarious specifically. Taxing earned income more than investments is a choice. Billionaires aren't especially charitable proportionally as far as I know. It isn't self evident giving to favorite causes should substitute for paying taxes. And you left out the other deductions and credits.

Splitting payroll taxes is just sleight of hand. Changing who pays nominally doesn't change the fact an employer budgets a specific amount for payroll, the government gets a specific portion, and the employee gets a certain portion. The equivalence isn't even controversial in economics. And the article said full compensation including a typical health plan. So the calculation included money they aren't actually being paid too.