Using auctions is economically efficient. And also harder for (corrupt) politicians to mess with.
> At the end this money comes from us anyway.
The money comes from customers of those telecoms who won the auctions. It doesn't eg come from the Amish or babies too young to use a phone. But they still (presumably) benefit from the government revenue raised by the auction.
We don't want nor do we need the telecom money. At the end this money comes from us anyway. Why can't we just skip the auction nonsense?