i'd love to see a proposal which would do the following (just an example; numbers just fallen out of my head):
 - if a miner makes a block bigger than 1mb he cant collect the whole reward/fees
 - the part of the reward which the miner could not claim should be distributed to nodes (a way i can imagine to do this is that the first node relaying a transaction encodes his address in it and gets a part of the reward)