Not much.
Michael was getting old. He was feeling guilty and trying to redeem himself for his kids, for Kay, and for himself.
The fact is, it wasn't all about the business anymore, it was about him and his family and recoilling it back together. It had nothing to do with a small time boss like Zasa.

"I'd rather laugh with the sinners then cry with the saints, the sinners are much more fun."-Billy Joel