It is a specific employee, and it was known from the moment he left that he had gone turncoat (his wife is Korean).
Example-wise, this is about morals and ethics. What defines a person as being trustworthy of not stealing you blind when you invite them over to your home for dinner on a Friday night.
The individual of interest here was an opportunist, the very sort of person who is readily recruited to sell out their home country as a spy for a little extra pocket money.
When your personal ethics are like that, of course you simply seek out the highest bidder and to hell with anyone that placed any trust in you.
Wut? Let's not get too high horse when it comes to corporate employment.
Companies have very little loyalty to people - if/when someone better/cheaper comes along, or when an acquisition results in "synergies", or when it's the annual let's cull the uppper middle managers who didn't make the jump to executive ranks - companies act in their own best interest.
As long as he didn't actually take documents, specifications, or any other internal documents with him, then calling him a spy is way out of line.
His lack of ethics was trying to get paid on both sides and frankly, I do think he should pay the stock proceeds back. But choosing to work for another company? Totally his choice and should not be criticized as long as he doesn't break his non-complete agreement. From the story line, TSMC had plenty of opportunities to make sure someone as valuable as him didn't get dissatisfied. But they didn't in his eyes and now they're just whining.