We have good working conditions mainly because we can now afford them.

Do you think poor people didn't get upset / rebellious in centuries and millennia past?

The difference now is that we have the GDP and tech to support much cushier lives for vast numbers of people.

Technology increases the size of the pie, but it is always possible to make the distribution of slices extremely unequal. More gdp and tech does not guarantee a better quality of life, as many countries today demonstrate.

Name such a country and then also explore that country's economic history over the past 200 years.

I think you'll be hard pressed to find one where life hasn't gotten vastly better.

Haiti