People don't even know how greedy/wasteful they are in spending. They're just trying to keep up with everyone around them.
Look at subdivisions as a prime example.
One family gets the super overdone clunky adjustable $900 basketball hoop, then in three months there's 4 or 5 more.
Don't get me started on peoples' 'need' to eat out.
When I told a friend we only get takeout/go out about 2x a month, they looked at me like I had three heads.
"How do you do that?" they asked. "How do you eat?"
"We cook."