What is the middle class... and why is it going away?

[things and stuff]

The erosion of the middle class is largely due to Republicans using southerners to undercut wages and to generally accept a lower quality of life in exchange for labor.

Most of these people hate unions and then wonder why the middle class is disappearing.

[Old Gringo]

It's the one between the lower and upper classes.

It's going away because the upper class has decided that they need more of America's wealth. So, they've convinced one of the major political parties that working folks have too much money and millionaires don't have enough.

Glad to have cleared up your confusion on that point.