So, the rules surrounding the game would need to be something like …
All clubs barred from taking loans
Immediate ownership transfer to the regulator if creditors (of any sort) not paid on time
Regulator then to sell on in the way that an administrator would
May avoid the need for the administration points deduction
Wouldn’t stop a billionaire from chucking money at a club, but with little to no prospect of any return may deter a fair few
Might even deter some of the sportswashing
Might help significantly with situations where the billionaire’s interest wanes
As you say, will never happen and would take a world wide project to make it viable