I believe he has a stash of cash....outside of France of course, that he took from various sources over the years. The thing is....this maid will have to accept payment via a US bank (or draw the curiosity of the IRS), then she has to put at least a million over to the lawyer who handled this mess for her. I doubt if she gets more $2 million at the end of this episode.
The settlement would be subject to income tax only to the extent it replaced lost income.