If you want cheaper cars, that's easy: drop the tariffs on Chinese cars and let them flood the market. Now you have cheap cars and your car makers are dead.

Or you can just announce that if the car average price has not dropped by N % by 202x, you will drop the tariff, and see that your local carmaker are perfectly capable of proposing cheaper vehicles.

And in parallel, given you figure people can no longer afford cars due to salary crunch by inflation, you can develop public transportation.

Oh well… except if the whole thing is just an excuse to deregulate for the benefits of your rich and powerful CEO pals and their shareholders…