The lines distinguishing one class from another are quite blurry these days. It would be fair to say, however, that it used to be middle classes were all professionals with university degrees...
The major reason that working class and middle class workers remain in these categories is because they are comfortable at that level. In the US there are many opportunities for someone that has a...
middle class means someone who has the means of production in a economy, while working class is someone who takes home a wage/salary. So unless you own a business that employs people outside your own...