It's true though, the more you earn the more you spend, I was earning around 20k in my early 20's and I don't have that much more disposable income now. Although I do own my own place and drive a nicer car now.
It's not true for everybody.
The older I get the less interest I have in accumulating crap so I spend far less. With a wage near enough 6 times higher than what I earned 10 years ago.
Cars, clothes, technology, phones, impressing others. You can shove all that where the sun don't shine. That alone ensure my outgoings are now LESS than what it was 10 years ago.