That would require a change in FCC regulations, likely at the the congressional level. AM and FM and broadcast TV are intended to operate as free services.I offered a third solution, which is charge listeners for radio. That's what Sirius does. That's what public radio does.
Public radio is free if you decide not to contribute.
Current technology and all current receivers are based on AM and FM being free. It's a little late to change over 300 million radios in the US.