What?
Who has the most power over Bitcoin? Right, these are mining pools. Who is most interested in preserving the current block reward? The same mining pools...
Look at this way: The miner cartels fuck around with basic fundamentals of Bitcoin such as halving (and let alone other stuff such as total supply or whatever they have a say at) and everyone dumps in fear and all they get is a dead economy. So as you can see it doesn't benefit them.