The PL have promised to pump £1 billion (40% extra) into English football (which I believe mean football outside the PL) over the next three years. Clubs have agreed to pay the living wage to all staff (on Chelsea currently do) and I heard something about the price of tickets for away fans but...
PL clubs can afford to slash ticket prices as it is such a small percentage of their income. However most PL games are sold out or near to sold out so the money men running the clubs are unlikely to do so.