In the real world, owners simply don't care about your enlightening idea. Why would they? And what are you gonna do about it when they don't?
Productivity (of something...) is ostensibly the intent of a capitalist venture, but the owner and ultimately prioritize anything they prefer. This is a problem for any hope of rational practice.
While that is true, the whole argument against metrics as goals is that they decrease productivity, which goes against a common interest of both capitalist and communist societies.
Productivity as a goal simply makes sense in the real world, regardless of whether there's an owner who is chasing profit, or a worker collective who has to meet their planned quota for the planned economy. The state of facts is such that binding metrics to rewards is harmful to their overall reliability, regardless of which economic system it's happening in.
Besides, why should anyone trust a leftist in power? We already know your lot will immediately outlaw and jail the opposition and pretend their uni-party system is "democratic". So I don't think you actually care about owners and power, you're just mad that you aren't in power perpetually.