But it's not less in local coffers. If the incentive was not given, the datacenter would not be built there. The state government wants it to be built there to increase economic activity in their state.
Residents aren't paying more for anything and no services are being cut.
There are 50 states in the US and plenty of other locations to build datacenters. "Still needing the datacenter" isn't a reason to build it in this specific location. It's ok to just admit you were wrong.
If the IRS gives me a 10% tax break, I have more money, and the government has less, right?