If you go down to "Fremont Street" in Las Vegas, you'll find lots of street entertainers that perform for tips (i.e. cash)
Lets be objective on a good day they can make several hundred dollers. So do they need to "Launder" their money? You're being rude, and you're implying things that are not true.
Legitimate escorts have legitimate income. Why not ask this question in private?
I remember riding around with a famous escort and we went to the bank with him having a stack of bills that was several inches tall. Wasn't nary a question. She just put it in the bill counter and finished the transaction.
As was pointed out before: