With all due respect, why not?
We incessantly hear that "time is money". Well, if I magically had more time, would I be able to make more money? Probably not. Would I pay more money, to buy more time? Generally, not. I occasionally pay professionals to do things, instead of DIY... but that's because they have more knowledge, talent, experience, facilities and tools. I'm buying knowledge, not time.
Working for a living, is the quintessential example of selling our time, for money. Well, I'd cease working because work is onerous, or forces me to live somewhere where I'd rather not live, or forces me to get up at an hour when I'd rather linger in bed. By not-working, I am buying privileges or conveniences. I'm not really buying time. If work were pleasant, easy, rewarding and imposed no constraints on my liberties, sleep or place of residence, then not only would I never retire, but I'd likely hardly ever leave the office.