Having worked, lived, and studied in both parts of the world I think you're completely missing the big picture. In the US you are almost exclusively an at will employee. In Europe that is not the case. After a set amount of time, that differs between countries, you get full time employment that is union protected.
As for unemployment numbers I will say it once again. Unemployment is counted differently in different countries. Right now the US is using highly misleading numbers so I would NOT look at those. Look instead at employment numbers.
You can look up how many people are working and compare it year over year. If you were to use unemployment numbers they are highly misleading since the parameters they use change as they change how they count it and they drop people off the statistics despite them still being unemployed.
Last article I read stated that over 100 million working age Americans do not have a job.
The reason unemployment numbers are dropping in the US is because the job force is shrinking. In other words less people are working. According to the US Federal government after a certain amount of time it's ok to drop them off the unemployment statistics since "they don't want a job anymore".
I think everyone should look at their finances and gauge what they're really spending. What are you spending on healthcare, education, daycare, transportation, food, utilities, and so on and how much is left over from your paycheck after these basic necessities are paid for? How much is time off costing you, extra vacation days, sick days, maternity leave, etc? Then you can objectively compare it to a job opportunity in a European country. In a nutshell I have found that you need to make a lot of money in the US before it pays off.
If you make $50,000 and pay $5000 for healthcare then you are paying 10% of your income for healthcare. If you are also paying $1500 for gas and a few thousand for a car then there is a good chance you're paying 10% of your income, or more, on transportation. You're most likely closer to 17%. Now I use these as examples and could go on but that 20%+ in extra costs is quite a bit. In Sweden healthcare is free at the expense of extra taxes and my transportation costs are a small fraction of what they are in the US because of better mass transit. If you're in the child raising years of your life a country like Sweden comes out ahead by a landslide due to the astronomical cost of daycare in the US. There's really not even a comparison at that point.
I'm not here to do a giant math problem for everyone on this forum but I can objectively look at the higher incomes and lower taxes in the US and compare them to the benefits I get in Sweden and despite the high "cost of living" come out ahead here. Things that cost me a fortune here are alcohol and electronics and I can avoid that quite easily. Food is pretty comparable. Rent is pretty comparable. Because of the smaller size of houses you can actually buy a home for much less money than in the US if you want to. It's tough to get a small house in a lot of the US but here I can get a large house if I want but I can also buy a small house or a flat which is A-ok in my book.