I grew up in an area where there were many millionaires. You would have been hard pressed to distinguish most of them from any blue collar worker they employed. They were all hard workers themselves, they generally drove vehicles no different to pretty much everyone else, they lived in houses much as most others in the area.

I went to school with their children and their wealth was not shown in any obvious way. We were all equal.

To maintain their wealth required long hours, hard work and generally being fair to everyone around them. Within the same area, we had people who didn't have the same level of wealth but considered themselves superior because they were lawyers, or bank managers or other professionals. These carried an air of distinction and superiority and many considered the "millionaires" as plebs.

One cannot generalise about any group based on some specific characteristic like money. Each of them is an individual and though some can and do take up airs, others do not. I have a son to whom I have lent money so that he can get ahead and he has always shown himself responsible, including paying me back. The way he is going, he will be a millionaire long before I am. I have another son to whom I will not lend any money to, as he has shown that he cannot handle the responsibility. They were both brought up the same way, only one took up the challenge to be financially proficient.

Different people will act and react in different ways and you cannot paint any group of people with the same brush.

Seems like a false dichotomy. For instance, Bill Gates' family was very well-off, but they never gave him a million bucks as an inheritance. What they did give him was private schooling, business connections, and computer time that allowed him to build a business and win a monopoly when everyone else was worried about getting a job.

That's true for most European countries, but not America.

Not challenging, just asking, do you have sources to back up your claim?

Social mobility is far lower in the US than in European countries.