Income Tax?

One thing I couldn't help but wonder about throughout the movie was taxes. If he got $100,000, he'd owe perhaps $40,000 in tax on it. And considering the way he blew off the financial advisor, I can't imagine him hiring an accountant and mailing the government a check for that on his own initiative (plus the countdown on his bank balance never indicated any such thing). Do you suppose the filmmakers actually paid him $175k or whatever and sent some to the IRS in his name? Was he just due for a nasty surprise one day when he gets audited? I was also initially wondering about the $10k car for his buddy, but it looks like the allowance for gifts is $12k per year, so I guess thats ok.

Movies and TV shows involving large amounts of cash never seem to bother with this, but it makes kind of a big deal in terms of how far that money will go.