[Dylan16807]

You can't reallocate time and money "on a moment's notice", but why does that matter?

Most events can be moved around, so even if there's a big delay on changing your work hours you can still exchange extra free time with extra money.

And people generally can choose how many hours they want to be paid for.

It's easy to quantify, it's just something that happens in bigger shifts. One hour by itself probably doesn't make you change your work hours. But as more and more hours pile up, eventually you might chose to reduce your work week by half a day. Or if you find yourself doing unimportant and uninteresting things very often, and with a shortage of cash, you might increase your work week by half a day.