If everyone switches to pay for outcome instead of paying for hours then they will pay the same or even better. Where better comes from I could do it in 1 hour and other 3 hours I was able to do whatever else.

Though not everyone likes that because there is a lot of people who benefit from hourly based pay. They don't do much but they put their hours in.

The second part is also quantifying outcome is hard... Should we pay that guy that fixed the machine in 5 minutes the same as if we would spend a week to fix it ourselves? Maybe we would fix it in one week instead? Should we spend one week trying to fix it and then call that guy ... or we would break the machine so the guy would charge us 5x more? Then you get all companies charging a lot more if someone tries to fix something on their own because they usually mess up.