Bitcoin gets regular updates like the Taproot upgrade when majority of miners agree to it. what prevents them from pushing towards higher mining rewards upgrade?

amplez_amplez
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the Taproot soft fork had approval of 90% of miners.

it seems too easy for miners to manipulate the bitcoin active developers into upgrades that benefits them like pushing the next halving to a later date, or something similar that could benefit them. it could be very subtle

how do we know there is no corruption in the bitcoin development team?