For the vast majority of us, it takes time to make money and, traditionally, it took more time to make more money (overtime pay is the most basic example of this). The paradox, of course, is that we don’t have time to actually enjoy the money we’re making and are instead on just running on the human hamster wheel.
This is why everyone is so obsessed with passive income and why The Four-Hour Workweek continues to sell copies year after year. We want more of our time without giving up our money. We want to keep the same lifestyle that our money afford us — house, car, spending cash — but we want to also have the time to actually enjoy those things.