It sounds good in theory. Poor people don't buy new cars, they buy used cars. It's hard to lower the price of used cars by subsidizing them since they are in fixed supply. If you subsidize them the demand increases. The increased demand raises the price, neutering the subsidy.
The way to lower the price of used cars is to subsidize new cars and then waiting 3-10 years. But that doesn't work well either, because pricing is global, and because the demand split for EV/ICE changes every year.
The way to lower the price of used cars is to subsidize new cars and then waiting 3-10 years. But that doesn't work well either, because pricing is global, and because the demand split for EV/ICE changes every year.