[throwaway34241]

But he also creates jobs by spending the money he earns (or giving it to his family to spend, or putting it in the bank for someone else to borrow, etc).

In the great depression there were lots of people who weren't working, but that didn't somehow create more jobs for everyone else. People not having a job creates less demand, which in turn creates fewer jobs.

Sure for any one job at one company only one person will fill the position. But it's one of those things that's true at an individual level but works differently at a country level. Like if you got a million dollars it would be great, but if everybody got a million dollars it would just cause inflation. How easy it is to get a good job is determined by big things like fiscal policy, interest rates, technology, regulations, etc and not who is taking any single individual one.

Having people who want to work not working (even old people) generally isn't a good thing, it doesn't create more jobs available overall (since demand is reduced) and the remaining working people have to pay to support the unemployed people with taxes etc.