Money is light; it's paper. It takes little to no effort to carry it around (other than those 4 seconds you spend putting it into your wallet). A $20 bill is virtually the same weight as a $1 bill...which is the same as a $50...which is the same as a $100.
But what if money were rocks? With each increasing value came a heavier weight that you had to carry. You literally would have to work for your money at all times.
In high school, one of my history teachers (who we all joked had a little something extra in his coffee mug) told us that apparently people tried this a long time ago. Quickly, these people realized the inconvenience of the situation. I specifically remember a comic strip of a person pushing around a wagon of rocks as my teacher shouted, "What a BOZOO." He's right. They were bozoos for thinking of using rocks as a symbol of wealth. But maybe they were onto something.
People want to be rich. They want to have the luxury of going out and buying a nice boat. On that boat, they're probably drinking something a little nicer than $5.99 Andre. Sounds nice, right? Luxurious. Convenient. Fun.
Today, people say that the rich one may not do the same amount of work as the middle man. The middle man does the work; the rich one designates that work. How is it fair? Bring in the bozoos. Now, the rich guy is still technically rich with money, but they're constantly working for their wealth.
Immediately, the word "rich" has another connotation. You can still buy a boat, but your tired. You can still go to a beautiful island, but it's pretty hard to get less than a 50 pound carry-on with all your "money". Would people still have a desire to be rich? Probably not. It's now a pain.
The idea of "rich" would shift. What's being "rich" without having to physically carry "it" around all the time? It's happiness. It's relationships. It's making good memories. It's learning. By simply taking out the one element, being convenience, having money is no longer desirable.
Maybe it sounds ridiculous; maybe not. But think about it. When having money becomes inconvenient, people realize the other (and better) ways to become rich.