Can gas-limits be set through stakers via a contract?

[NanaLelyakova]

If Ethereum is moving towards Casper/PoS, and is set to remove (less invested) miners from the equation. Why not move in that direction with some baby steps. You will want to have miners opt-in to use these limits as a default first, but in a later step you might want to enforce them (somehow). So, what about a contract where you lock your coins in exchange for voting rights on gas limits?