Taiwan doesn't own TSMC. They don't tell TSMC how to do business any more than the US government dictates to Intel. I'm sure it wields influence, of course. The US government offers incentives for companies to build foundries in the US, and there's a large pool of skilled workers in the industry in that area. Also Taiwan is a small country, so it's quite possible TSMC needs to expand internationally in order to be able to scale up it's business.
Sure, but the US gov't provided no seed money or had any role otherwise in founding of Intel, unlike TSMC. Up until recently the US chips companies were pretty much on their own without much special pampering. TSMC has little or no desire to expand beyond their tiny island -- not only b/c of the gov't investment's national stake in TSMC, but also TSMC's business model doesn't work -- and certainly can't maintain its fat profit marign -- without gov't largess and econ protection.
