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.
Person A: I just got this huge
raise, any ideas on what to spend it?
Person B: I think you should save it, lifestyle
creep is easier to prevent than to
stop.