1) It was also the result of the government funding a massive push to educate the workforce in the post-secondary education system. If you look at 1910, which was an era where big business was running things, 2.7% of the population was college educated. By 1990 it was almost double that.
The notion that industrious people created the middle class is laughable. It was clearly a partnership between the public sector which educated the workforce and the private sector that took this new workforce and created a booming economy.
2) You seem to have some belief that the ruling class is different than the industrious people you keep mentioning. Politicians and business owners make up the ruling class.
3) Yes, government regulations clearly have their costs. There is no such thing as a system with no drawbacks. But any system without regulations is going to turn into an oligarchy in short order.
4) No, we trade liberty for comfort all the time, and it is a good thing. Absolute statements are almost always ridiculous. We trade some liberties to create functioning societies because those societies give us more benefits than the few liberties we gave up.
5) If you think work is not a burden you must never have done back breaking labor. Some work is most definitely a burden.