Full-time football is not the problem.
Paying people wages that they can't afford is the problem.
It is possible to have a full-time club where you pay people wages you can afford. It's what all other businesses with full-time employees seem to have no problems doing.
Ergo - it's not full-time football that's the problem. It's financial stupidity.
What can the FAI do to stop clubs that seem deteremined to make crazy decisions ? The FAI don't run the clubs. Those who do need to take more responsibility. And others need to stop looking to the FAI to act like the UN all the time.