Money is not important. It’s the lack of money that is important.
If you make enough money to pay your rent/mortgage, pay for food, utilities, clothes, cars, insurance, etc. If you can afford to fix things when they break and go to doctor when you’re sick then you have enough money. How would your life be meaningfully different if you made twice as much? Bigger house? Newer car? Nicer clothes?
If you don’t make enough money then things are very bad indeed. And many things end up costing you more.
If you don’t make enough money then you will be late making payments and you credit rating will go down. If your credit rating is low then you have to pay more for a lot of important stuff.
If your credit is good then you can get a car loan for 3% interest. The lender will finance up to 135% of the retail value of the car.
If you credit is bad then you could pay over 20% and the lender might loan only 80% of the WHOLESALE value of the car and charge a loan origination fee of $1,000.
When people have bad credit and need to borrow money they can pay hundreds of percent interest. A bad credit report can effect your ability to be hired for a job or to lease an apartment.