You'll still need to convince the purseholders to pay you, and they'll want some objective metric to measure your output, and whatever metric they pick will be gamed.
But this is already how the purse holders operate. A big group of experts get together and vote on which grant proposals within a given category to fund.
I think it comes down to how the system is structured and how many players there are. The more difficult it is for a small cult to capture control of the funding (or access to instrumentation or awarding of degrees or whatever) for a given area the less likely you are to end up with a monoculture.
Assuming the majority of the funding continues to come from governments then you have a centralized point of leverage that can shape the system. So it should be possible to impose constraints that result in a system that actively prevents monocultures from developing.
in much earlier institutions of knowledge and excellence,
the only transparent metric was whether or not they approved you.