[gottago]

Tesco can't charge me for my groceries on the basis that I use Sainsbury's. If people choose alternatives, then that is their choice. You can't just say "I'll charge you anyway for the BBC".

But what you're describing is exactly what currently happens with live TV and the license fee. If you watch 100% commercial channels but not the BBC you're still having to pay a license fee that will go to the BBC in its entirety.