Throughout history access to material needs has been the flashpoint for any large scale public revolt.
Credit has made it possible to stagnate wages and increase prices. We eat food and buy clothes and other novelty items and services we don’t actually have the means to pay for, receive education and ‘hope’ for a better life without anyone (including taxpayers) actually paying for it. Can even pay rent in credit in some places. Credit and loans just perpetuate the myth that our time and labor isn’t being undervalued while we aren’t actively enslaving ourselves settling for less and keeping the wheels turning.
How much of the working class could survive without credit cards? If people weren’t able to buy things either prices would fall or wages would increase (in theory who knows what these ghouls would actually do) or there would be revolt yet here we are