Not to say things like this don't happen in private industry too - it certainly does. But at least you've got a chance. In most companies there is room to meaningfully bonus or promote or otherwise reward exceptional performance. You may or may not get something, but at least you can ask or push for it, and if they want to do it they can.
Neither do private companies. The measurement becomes the goal. And that measurement often has nothing to do with legitimate performance.
2. Start a consultancy company and overcharge clients to do this work.
3. Realize that many companies will not reward you for your efforts as you expect and go back to 1
If you're just looking at numbers, something that costs $$$ is "harder to do" than something that costs $$. Any consultant that costs $$$ provides better work (Why would I have paid $$$ if the work wasn't better? Why would anyone charge $ to give the some quality?)
Then leave, become an outside contractor and you can be the benefactor.
Save exceptional work for small companies that will reward it or your own startup.
Or ask for more work and don’t be surprised when you do or don’t get rewarded for it.