3/4 of the people on this planet do not have shelter, food and water on a daily basis. 93 out of 100 small businesses fail within 3-5 years. Most people have no alternative but to work in menial jobs that barely takes them through the month.
Not all can get a great paying job due to the nature of our system. Historical slavery did not actually involve hard labour (that's the movies part). Most slaves were simply owned by their bosses as much as most people today owe so much to the bank that they end up slaving away, day in and day out to just make the bare minimum interest payment.