Time and space are both mathematically identical. They're the same thing.
My life is limited to a certain amount of time. If you want some of my time it needs to be rewarding either financially or otherwise.
If you spend money, you can save time.If you use time smartly, you can earn money
The person is a huge factor in that equation. Its only money if you're worth it, if your time is actually worth anything to anyone. Your time could be worthless. Everything is worth what a purchaser will pay for it. The universe doesn't define that worth ... people do.
If time is money, everyone with time on their hands should be rich. But people do not necessarily use their time to make money...not every time. Money is a variable, Time is a constant. They are more unequal than equal.