I don't think homeowners not on the edge, ever needed rebates as cause for action. It was just a matter of fairness. To not miss out on money a more clever or careful person might find. Kind of like the bargaining for low air fare. We never minded contributing to survival of our needed carrier. We just didn't want to pay more than someone else.
Now, some who have drawn rebate money as a permanent drain of the Public Purpose Fund, might wish to reinvest their energy savings to help others. That 3% tax on utility bills should accumulate hereafter, being let out only on interest-free loan. If the fund is a growing pool, it will not be seen as available for other government needs.