This is the crux of it. Originally, I was supportive of the principle that P&S/FFP would help ensure the financial stability of clubs, so clubs did not fold.
I still think there's a place for such regulations, too. However, intentionally or unintentionally, the rules have created a glass ceiling that means most can't compete.
Those key clubs, who were financially thriving when they were imposed, have been provided an advantage, and that advantage protects their closed shop.
In layman's terms, clubs can't spend more to close the gap or they'll fall foul of the rules unless they get success, which like us is unlikely. That puts you at risk.
I don't know what the right way is to fix it, but a bond or something with x-amount of money to cover losses over a period of ten or so years could be it.