That's like saying that my Amazon spending habit is funded by my credit card company. Technically, it is, but they send me this silly bill every month, and have a stupid rule that if I don't pay it each month, they'll eventually cut me off, and sue to collect the money. So even though the credit card fronts the money to the merchant, I'm still the one who ends up paying. The bank won't allow the money they pay the merchants on my account to exceed the amount I pay them, over the long run. Similarly, Congress fronts the money for the FCC's operation, but they insist that the money be paid back in user fees. They won't allow those appropriations to exceed the user fees in the long run.