Paper bills are issued by the Federal Reserve Banks, not the states. Debit cards aren't "Tender in Payment of Debts" at all: creditors don't have to accept payment by debit card.
The point is taking the language in that document literally is a ridiculous exercise.
The men that wrote it had barely discovered electricity.
We romanticize the achievements of morons.
The document says the states cannot force creditors to accept payment by card, and they don't.
I'm not trying to romanticize the constitution, and I agree that parts of it are pretty moronic. I don't really have an opinion about this section either way, but my point is that it is in force as it stands, literally.