People are highly irrational creatures. If you ask someone whether it’s fair for a person to do nothing all day having their work done in an hour, vs a person who takes a full day to do the same work, they’ll probably say no. They might say it’s ok but they’ll feel the person with all the time on their hands should be doing SOMETHING. The fact that both people are doing the exact same amount of work is irrelevant since one is doing nothing and relaxing.
Discussion
The answer is to engage in leisure rather than "do nothing," I think.
The person who does all their work in an hour to spend the rest of his time woodwork, gardening, playing music, working on side projects, or coaching his kid's soccer team will be respected more than the person who takes that extra time to binge Netflix.
The one is efficient, disciplined, and virtuous. The other is just efficiently lazy.
The same irrational thinking.
It’s none of your business what the other person does.
You haven't explained why it is irrational.
"Rational" implies order, logic, and purpose. "Irrational," then, implies chaos, illogic, and aimlessness.
We are rational beings, so to see our fellow man using his faculties in a well-ordered way in pursuit of some good is to see a man more fully alive.
It may not be my business to tell another person what to do, but it is right to admire certain types of activity over others.
I agree with you on the fact that most people reason this way. But IMHO it is bad for the individual in question to waste their time in this life. Moreover I am convinced that if the person who gets a lot of spare time is using it to study, train themselves and nurture valuable relationships in their life, not only they get a better life, they also will become efficient over time. At some point they might spend that 1 hour assigning tasks to 200-300 people and get much more work done then they did by themselves before.