Taxes do pay for it. That's a whole other discussion, taxes going to the right causes.
But the operator needs to be paid, whatever emergency personnel are dispatched have to be paid, the phones and call centers and ambulances and firetrucks have to be paid for.
Mostly though, i'm sure it's to deter people from calling because their cat is in a tree.
That really pisses me off when resources are wasted to get a cat out of a tree. Just leave it alone, it'll come down, just maybe not when it's owner wants it to.
What were we discussing?