They couldn't punish Michael in the way local law demanded.. There's anough talk-no-jutsu about that..
The other, less politically tricky, co-conspirators most certainly did get the Hammer....
Shota came up with a clever way to "promote" Michael to a sidetrack that would have him... occupied... and contained.
And financed it to Make It So....
It may seem like a reward, but Michael has gone from influential, nearly untouchable, prostitute to a mere fucktoy slave of a male slave trader. Literally gone from Top to Bottom, as the final scenes show...
If he were to do something stupid again, his status now is such that it'll not be his dick coming off... And sooner or later he's going to realise that..