That's kind of my feeling about it too. It's a temporary and changeable state.
I think some months you can be skint, and others you can be flush, so to speak. If we don't have surprise boiler problems/big bills we weren't expecting, then on normal pay, we should have money left over before payday.
Some months, we might find we've done really cheap food shopping, and we're actually quite comfortable just before payday.
This is not the same thing as being poor/living in poverty. Long term financial struggles, eg. to even put food on the table, month after month.