This is not just some pork-barrel politics of bribing a company to stay in a given country. S Korea will view this similarly to Taiwan - their chip fabs are existential to their country and state. The USA is becoming more isolationist - it is nearly oil-independent, so it's signalling pulling out of the middle east (deals with Iran etc). But it is not silicon-independent. So S Korea and Taiwan are totally dependent o…
Did anybody do the math of whether it's more cost effective to pay for all that military to ensure you get cheap silicon made in countries with cheaper labor that in the US rather than just subsidizing the production of semiconductors domestically?
Very large parts of it is protecting democracy. Whether you believe that's worth protecting is a different question, but it's left over from cold war & proxy wars against Russia in both Vietnam and Korea.
This is still once way the US exerts its presence against China. Maybe futile, but it is more than just "cheap labor".