At some point this is banging-head-against-wall grade stuff, so I'll probably stop here. You're in the right area on the sales tax example, but it suffers from the same belief construction and expression issues.

Let's play your example out in a conversation:

1: "I don't believe anyone should pay sales tax!"

2: "But you (someone who is anyone) do pay sales tax, are you a hypocrite?"

1: "Of course not. I have to, it's the law."

2: "So you believe nobody should have to pay sales tax, but they must when legally required?"

1: "Yes."

2: "Oh good, that seems reasonable. I also hate taxes."

So to rephrase in terms of a subsidy, not accepting the subsidy is the same as giving the government charity.

Not giving charity while being opposed to subsidies is not hypocritical.

This is a bizarre hill to die on.