Why Countries wants to manufacture cars ? Reduce Trade Deficit

. Why Countries wants to manufacture cars ?
. Cars is increasingly becoming a trade deficit for most countries
. So by building a local auto industry, cut down in imports
. Reducing Trade deficit.
. Make the economy stronger.
. Therefore countries like Malaysia has printing Saga
. But small countries like Singapore goes one better by having COEs.
. Certificate of (car) Entitlement. Which could be as much as US$50k

http://english.vietnamnet.vn/en/special-report/15793/big-automobile-manufacturers-leaving-vietnam-.html