Most people like to spend money now instead of later though, and the charts reflect that. It's as simple as time preference.
{shakes head sadly}
There's plenty of examples of people that win the lottery, only to spend it all within a few years and be back to where they started.
Put it this way: you have a car. Sooner or later it will break. Are you preparing for that? Are you setting aside money to repair and replace it - money that earns you interest while it builds up? Or are you borrowing money and spending all your money on payments, risking that you won't be able to pay rent if your transmission breaks?
OK, if you make minimum wage, this is hard to get out of. But it's possible. Can you live with your mom? Can you drive a worse car? If you can get that thing paid off and get ahead of the debt, get some savings going, you'll be on a moving sidewalk to better finances, less stress and unhappiness, etc. If you're spending everything on a payment, you're on a treadmill pushing you toward bankruptcy.
Yes, it's hard to make do with a small income. But saving is something that really, almost anybody can and should do. Liking to spend money NOW should not overrule our desire not to be thrown out in the cold next month, or our desire to sleep peacefully. There must be a balance, and all but the most destitute can do this. By which I mean "half a cup of rice a day."