Utility companies already run credit checks on new customers. This doesn't seem like a big leap from that. They may already be estimating income based on the credit check. I don't disagree in theory but utility companies today, across the country, are already all up in your financial business.

Source: I got a new apartment in a new state and had a lot of difficulty proving that I make enough money to get electricity from the utility company. The utility company was harder to convince than the landlord renting me the actual apartment.