The SpaceX employees that got laid off are going to get other jobs and continue making more money and having more money to spend than their European counterparts.

Edit: A few reasons. One is that, since it's easier to switch jobs, good employees have more leverage. Another is that, since it's easier to fire bad employees, the expected value of a new employee is higher and you can afford to pay them more.

I think a big part of American prosperity is a result of companies being able to fire people. It's probably the most important bit of employment non-regulation that this country has, and it's a big aspect in which America is more worker-friendly than European countries. Other missing regulations, like working hours limits, vacation time regulations, don't benefit workers as much (or at all).