This one. I don't think that an illegitimate business can run forever. Sure they can hide and camouflage it, but sooner or later they will be unmasked.
The government job here is to prevent if it's still possible so stopping a ponzi could end it's operation abruptly.
That is the big factor here, the government, in our country I have heard a lot of pyramiding scheme since I was a little, and no matter how they try to hide, it will eventually fall. Either the people behind the bottom is the scheme complain because they have not received their commission, or the government will step in and crush the scheme for good.
And the loser? Those investors who fall for this kind of trap and nothing has changed for the last 40-50 years.