Lifestyle creep refers to a
phenomenon where an increase in income leads to an increase in nonessential expenses (things you don't really need).
When this happens, things that used to be luxuries become your new normal, you perceive them was if there
essentials.
This
phenomenon can start a loop:
You get a raise, so you have extra money.
You have extra money, so you spend more money.
You spend more money, so you live check to check.
You live check to check, so you work harder.
You work harder, so you get a raise.