You then get other problems as you incentivize output over work done properly, which if implemented improperly can just result in endless rush jobs that pump up

You then get other problems as you incentivize output over work done properly, which if implemented improperly can just result in endless rush jobs that pump up the metrics while lowering overall quality. "When a measure becomes a target, it ceases to be a good measure." A common example is doordash and similar delivery services where people are paid by delivery and not by time spent on the job, so they race around ignoring all traffic laws and nearly get themselves killed half the time to shave off those extra 30 seconds.