I am seriously suggesting…
I am seriously suggesting that some people will be free riders if you let them.
The question is why you think that “people” have this problem but legislatures don’t (legislatures are, remember, made of people). Free-rider problems become more of a problem, not less, when the people making decisions about how money should spent bear no personal cost for how it is spent. If you’re seriously concerned about the free-rider problem, then you need to think harder if you think that externalizing costs for the decision-makers is the best solution to it.