Quite interesting. What's to stop the bitcoin pool from consolidating into a few key players as difficulty to mine progresses? There's no way that the miners

Quite interesting. What's to stop the bitcoin pool from consolidating into a few key players as difficulty to mine progresses? There's no way that the miners are spending >250k/mo and pushing bitcoins back into the system. Wouldn't this hypothetically consolidate wealth in the hands of those with enough capital to create monstrous factories like this?