Currency isn't the problem, and you really need to keep that concept separate from the issues that happen within Capitalism.

Currency is just a convenient method to measure and exchange resources.

Very few people desire an allocated home and weekly rations of flour, chicken, and butter. If you instead give them a list of things they can choose from, and assign ratios and a limit for total resources, all you've done is create a new currency.

That's where I am too.