Yes, that is one of the questions being asked to witnesses, if to change the current linear reward system with a superlinear one. The witnesses seem to agree this is a bad idea (for now).
But there are other changes they seem to agree would be good for the ecosystem. You can see them all (and their votes/comments) here:
https://steemit.com/witness-category/@cervantes/witness-consensus-status-to-fix-the-actual-steem-s-economic-flows-eng#@exyle/re-cervantes-witness-consensus-status-to-fix-the-actual-steem-s-economic-flows-eng-20181027t063352750z
@exyle makes a great point, that this should be changed at the SMTs level, and there's no point in even discussing it before SMTs are out.