Does your mob allow a bunch of deductions, tax dodges, "carried interest" rates, IRA's, and other tricks to cut what the well-to-do actually pay them down to half (or less) of their headline "rate"?
EDIT: Examples so far seem to be limited, one-off "if you're patting the right guy's back" situations. Vs. the US gov't allows an unlimited number of sleazy Wall Street types to launder unlimited amounts of money through various tax dodges. This might be good evidence that the mob is smarter about collecting "taxes" than the US gov't...but it sounds like the answer to my question is "basically, no".