Hmmm.... if the block reward percentage for miners was increased from 50% to 90%, nearly double, wouldn't the hashrate need to nearly double to maintain the current price? And what of the masternodes who would receive 5 times less than what they do now? You don't think that wouldn't cause a mass exodus and crash the price to new lows?
They already receive less, that was my point. Masternode ROI is negative if the market wants it to be. The reward ratio is meaningless without taking account of capital loss. So yes - there may be an exodus initially, but once it stabilised again we wouldn't have this huge overhead to pass on to the market.