Worker's rights are not an issue when labor is 30% of what they would have to pay in the US for the same skill/talent. US skilled workers don't have it any worse than EU skilled workers, often way better. This isn't flipping burgers at McD's where you have no bargaining power and need unions and labor regulations to protect you.
And you need a lot of skilled people to operate a heavily automated semi fab: PLC programmers, opticians, physicists, material scientists, contractors, HVAC, electricians, plumbers, construction workers, Q/A, etc and irrespectable of workers rights, all those have much lower bargaining power for high wages in the EU than in the US, due to market supply/demand.
Otherwise there would be no investments in the EU and nobody would be making stuff here at all.
You might be thinking of two very different things - in the US wages are higher but social benefits that employers pay for are lower. In the EU you might pay a lot more per worker than his wage since you pay much higher taxes.
If you wanna hire skilled workers in the US it'll cost you 2-3x more than in EU, taxes and all included.
I don't know the exact answer, but what I'm trying to say is that there's no free lunch for employers in either location, but I'm pretty sure they do their homework on this and they know the exact answer when they decided to open up shop somewhere.
Those definitely cost more and have better working conditions in the UE than the US, but that's OK for McD, because the burgers flipped in the EU by the costlier workforce don't get exported worldwide, but get consumed locally and therefore all this is reflected in local prices for local consumers which have no competition from imports from abroad.
But when we talk about skilled workforce for the semi industry and the products being fungible and exported worldwide, the equation can start to flip.
Not really. The margins Nvidia earns designing their chips are far higher than what TSMC earn fibbing them. TSMC actually has coemption. Samsung are only one node behind which is just enough to drive price competition down. Meanwhile Nvidia has no competition. You wanna be where Nvidia is, not where TSMC is.
OF course, this might change in the future either way.
This is gross salary, on which you need to deduce social contributions (social security, retirement, unemployment insurance, and others) and usually reduces by 20% the gross salary. Then you get to pay income taxes in this net salary, which is around 10% of the net salary.
Note that sick leave is not paid by the employer, but by social security (the employer can complement). Social security here is the public healthcare and retirement system.
I am a software developer, I've relocated from US to France within the same company, and was paid 3 times less in the same role. As the private sector has extra contributions before gross pay, I estimate the employer cost is around 2 to 2.5 times lower in my case in France than in the US.
It is now also easier to fire people in France (probable the same in other EU countries) due to recent changes in employment law.
Each EU country is going to have a slightly different pay structure, but that gives you some comparison basis.
So overall I think the 2-3x ratio in skilled worker cost in EU vs US is a good estimate.
40k would be high for Greece ir Portugal though. I guess it's the same for US, depends where you are