A few problems with your claim.
1)Dealers charging more because of discounts is not clear or universal. It certainly isn’t the case with either the Hyundai or Kia dealerships I visited. Both were offering the models at MSRP. I suspect that is driven much more by the tight supply, not the govt rebate, as rebate-eligible cars were going below MSRP prior to COVID.
2)MSRP is what drives rebate eligibility, not net selling price from dealers. Brand head offices decide MSRP. The ‘they’ that is setting prices, isn‘t the ‘they’ you claim to be hosing buyers.
3)We don’t know what the new rules will be. Or if the GV60 would qualify for a rebate under a new regime. You can certainly bet they won’t qualify under the current one. While they do intend to make medium duty vehicles eligible, the rebate criteria could easily be crafter to apply to vehicles of certain GVW, towing capacity, classes, etc. that would allow higher priced trucks to qualify, but not passenger cars of similar prices. We already have the in the current program, where cars of five or fewer seats have one price limit, and those with seven or more, another.