That is the work I do. I am paid per job completion because I am in the repair industry. My income is entirely self-generated; I make my own salary based on output. That is how this business functions, and there is no alternative model that actually works. To remain competitive, I have to work six days a week. We cannot raise prices beyond a minimum threshold without losing work.
It sounds great to say people should work less and live more. Unfortunately, in certain sectors of the economy, that idea is completely disconnected from reality. In industries driven by throughput and competition, working less directly means earning less, and for many of us, that is simply not an option