Again you're assuming the default option is buying a car. Society shouldn't be paying people to buy cars, especially rich people: that's not a good thing to incentivise.
> We can talk about alternatives to car, that isn't where politics is at, and I'm not sure tax credits would be a particularly good tool for encouraging alternatives.
Surely if you believe tax credits work for electric cars then you should believe they would work for other things too.
> As I said don't let perfect be the enemy of good.
Is it even good though? It's hard to believe that paying rich people to buy cars (which still have negative externalities - land use, congestion, traffic deaths) is a better-than-replacement-level use of public funds.
Bicycles are relatively cheaper, I suspect the barrier to cycling isn't cost. Its infrastructure, culture, etc.
But they're being subsidised to buy a more expensive car. The aim is to bring it in line with other more expensive cars.
It isn't $10000 off the default option, it's $10000 off the better for society option to bring it more in line with the default option. If it works as intended the buyer doesn't save money.
I suppose you could structure it to favour those with lower incomes, it would be more costly, more complicated, and I'm not sure how you could get to a sustainable model as quickly. Poorer people would presumably want cheaper cars, but currently EVs are expensive, so you would need to subsidise them that much longer, and potentially right about now you'd have cross subsidy anyway, with rich buyers buying expensive cars with R&D paid for with government subsidy money.
We can talk about alternatives to car, that isn't where politics is at, and I'm not sure tax credits would be a particularly good tool for encouraging alternatives. As I said don't let perfect be the enemy of good.