No, sorry but that’s a very dumb way to think about it.
If someone can get something done in half the time it takes someone else, and is slacking off the rest of the time, is he stealing from the company ?
Obviously not. And would his total output be significantly higher if he tried to work continuously ? Not necessarily.
Different people have different productivity patterns.
The point is that trying to impose a rhythm or longer hours onto someone does not necessarily improve their output, no matter how much you try to force them.
why, if you are paying him its means he is making more money than you spending on him, if you aren't willing to pay the premium for the effort why he need to make the sacrifice of more work for free.
I find the casual way people flagellate others for having a healthy work/life balance to be concerning.
If your boss is happy with your output, then it doesn't matter how many hours you work to make that happen.
You are paid to produce a result, not to warm a seat for 40 hours a week. I'm sure you will have all sorts of mental justifications for why that's unreasonable or why others should be working themselves to death for nobody's benefit but their boss's, but that's how it is.