To the contrary, that's the entire premise of government regulation and spending.

Most people aren't going to voluntarily send money to the FDA, Social Security, or Medicare, or the courts, or the military, out of the goodness of their hearts. Left to their own devices, they'll freeload. But we all agree these things are important (as evidenced by how we vote), so we pay for them with mandatory taxes.

So your idea that something is nonsensical "if the vast majority aren’t willing to use their wallets to back this or that" doesn't hold water at all. Most people won't use their wallets to back anything, if it's left up to them as individuals.