I'm Spanish. I make about 40k/yr. I wouldn't move to the US for, say, 200k.
I have excellent 0€ out of pocket 0 paperwork healthcare. I walk to my 35 hours per week job. I have about 50 days of vacation each year. I have a small second home down in the beach to enjoy them. In my 150k people hometown some years there is a murder or two, and most years there isn't one. When people rob a business they might threaten with a tiny Swiss Army knife, or maybe just yell very hard.
> I know several Spaniards who emigrated to the US,
As do I. They all seem to have moved to cosmopolitan places with advanced economies, not Mississippi. I also have friends and relatives that have migrated to Spain. Overall, there is no mass migration in either direction.
> The situation you describe is… one of statistics and not reality
A high speed rail network and universal healthcare are not statistics, they are as real as it gets.
But I definitely agree that Spain is probably not a good place if you want to make an absolute shitload of money.