They have played according to the rules in place at the time, forcing our will onto them would make us no better than them.
They took advantage, we would be taking advantage.

Better, imo, to shame them.
Then, they may have money, but they get no love.
How will they feel when their rep goes negative?
Less omnipotent, I'm sure.

Greedy people gonna greed, it's just in their nature.
We don't have to surrender the high ground by forcing them.
They know their greed harms the tribe, and by extension, themselves.
Being efficiently greedy is a lot of work.