I once went to court against a client who wouldn't pay his bills. The sum more than 35K. It took over 9 months to get to court ( as the court wouldnt give a date ) and countless docs and hours spent to come up with evidence folder. In Australia, a citizen can argue their case which I did without using any lawyers. Finally, we both argued our case to a point where the client's defence was that there was no time log fo…
Consider the unintended consequences of what you're proposing. Most software projects end up taking far longer than initially estimated. If you tell your manager that you can have something done in one month, and it actually takes you two months to do it, does that mean you should take a 50% pay cut for those 2 months? Or that you should work 80 hours weeks to get it done in 1 month?
If you're a freelancer who doesn't charge by the hour, more power to you. But most people prefer the stability of a fixed monthly paycheck, regardless of how productive/unproductive they may be