remember that are not the miners that make the fee, they could accept even the lowest fee if everyone was using the lowest one and reducing the average, it's up to the peple that decide what fee to use
if for example everyone start now to lower his fee the average would be like the old 10k satoshi per transaction, but instead everyone is rushing to have his/her transaction prioritized and this is increasing the average, miners have no fault here
Due to increasing difficulty,bitcoin mining has become a expensive affair.If there is no reward for miners which can not only cover mining cost but also give them good profit, noone will mine btc anymore.
No mining means death for bitcoin.