Unfortunately money talks. I hate this idea but it is probably inevitable. If those 6 clubs were kicked out of the PL how much do you think BT and Sky would pay for TV rights? 20% of the current deal? Overseas 'fans' want to watch Liverpool, Man U and Arsenal and to a lesser degree, Chelsea, City and Spurs.
Overseas subscriptions/TV rights are where the money is and those 6 clubs are well aware of it. The wages of players in what was left of the PL would take a massive nosedive.
The beginning of the end.