Public schools or libraries are probably a better analogy.
In the US, various forms of taxation at the federal, state and local level go in to providing funds for public schools. Everyone pays for schools even if they have no children. The only significant exception is that in some places, parents can receive vouchers to pay for private schools. Either way, the goal is that everyone receives a basic education to make a better society.
Everywhere in the US I've had a library card, it was similar. Libraries are funded by general taxes and their basic services are provided without charge to users who live in their tax area (county, most places).
Whether publicly-funded radio stations are a valuable public good in this way is reasonable to debate, but that's the model.