Then you would clearly prefer your wife worked in Asia, where as soon as she turned 35 or 40 working (anywhere) in the airline industry...she would have been out of a job.
And without unions, who is protecting those over age 50 or especially 55+ workers in the United States who are making up the biggest percentage of workers (mostly involuntarily, some due to Covid and preexisting co-morbidities? Now you can quote Ayn Rand back to me, supply and demand forces, equilibrium, survival of the fittest, but the fact of the matter is that America would only work well for the Top 10-15% of society and the rest would totally be screwed over in the labor relations picture you're painting.
Now this might even work from a capitalistic perspective, but eventually you're going to run out of emerging markets to sell to if we continue to gut the middle class...not to mention we're now bordering on becoming a "failed democracy" because so many members of that middle class don't believe they have any where left to turn.
As a former member of a teacher's union, I would have been more than happy to give up tenure (after 2-3 years of teaching) if they would have made it possible for teachers to somehow be compensated based on year to year performance, but how are they going to measure or quantify that...the worst teacher in the school could get the biggest raise if it was simply dependent on working with the top classes in any given school. So then if you look at percentage of improvement or whatever, well, that's even more complicated because the students already performing well will have a ceiling there. Beyond that, effectiveness of teaching based on a state standardized test score is increasingly challenged as a measure of teaching effectiveness. Just continuing to raise salaries based on years of service ends up with many older teachers simply clocking in and out until they max out their pensions (let's say at 60% of last five salaries), but then if you're going to take away union protections, are you going to be willing to raise salaries by 25-50%? Most Americans believe teachers are already fairly compensated, and get "too much" vacation time, for example...or don't believe the media narrative of teachers spending 5-10% of their salaries on student needs being unmet by their building budgets.