> If they pay the same rates as everyone else then that's not corporate welfare.
It is, because the electricity companies don't have magic electricity generating machines that can scale infinitely.
To satisfy the new demand which only exists because the data center was built, they spend a lot of money on new infrastructure. They then raise everyone's prices by an equal percentage to support this new infrastructure even though the infrastructure was not needed until the data center was built.
Not charging the data center developers for that extra build out and expecting everyone to absorb the costs for new infrastructure that never would have been built if the data center wasn't built is absolutely corporate welfare.