that being poor is more expensive
because it's difficult to save up it's difficult to:
-buy quality items, leading to more breakages and more replacement costs (long term more expensive)
-buy quality food (or have time to cook it), leading to shorter life and less health.
-maintain a house/apartment at a high level (higher resale or returning of deposit) and again health and happiness
-may not be able to do a bank account, so check cashing stores and their percentages
-no bank account equals no credit cards or debit cards, makes it difficult to pay online, so penalized in stores for paying bills there frequently
-no credit card means probably lower credit rating (even if one has a credit card frequently one has to over utilize (over 10% of limit)) leading to bad credit score leading to worse loan chances for car or similar
-not a large reserve saving means any expenses coming down the pipe (damaged headlight, broken washer) aren't problems, they are disasters
-can't take a day sick because you can't afford to, nor can you afford potentially loosing the job
-can't move easily, have to come up with, first/last/deposit and possibly movers fee or truck rental (no cc..problematic), also long distance moves are expensive
-changing jobs means you may have to, move, get different transportation, get different child care, have a gap of a couple of weeks in paychecks
-improving education can be more expensive due to schedule limited by work
just of the top of my head heh
i'm sure this list could be made 1000 times as long at least