That's actually unevitable. Everyone is richer today (in a sense) than 100 years ago, and the quality of life and work has increased for hundreds of millions of people. Imagine all the people who do not have to work the fields due to machinery. Now we just need to further these advances and soon enough we'll have a world where most of the menial work will be automated. At that point there will be a revolution and the rich will be forced to pay a hefty 70% income tax to provide for the 70% of the population not a work.
