[trevelyan]

I'm not arguing that you have the right to a credit card. But you should not be discriminated against on grounds that violate the social compact. Otherwise, your argument suggests it would be legitimate for Visa and Mastercard to refuse to process donations for specific political parties or politicians. Or for Paypal to close the accounts of people who vote.

I think most people would accept that there is a fundamental right to engage in peaceful trade. And just thinking of the issue practically, there are far more ways for someone denied access to the subway to get to their destination than there are ways for people to collect money remotely without access to the banking infrastructure and credit transfer services.