On this subject, I always think about farms.
Back in the day, it took ~100 people to work a large farm. Now it takes one (or a few) guy(s) with some machinery. All those farm workers aren't now out on the beach somewhere -- they've migrated to the city to drive cabs, etc. The wealth generated by this astounding leap of productivity went entirely to the shareholders of the John Deere corporation. (edit: Yes, cheaper food benefits everyone. I meant the share of the revenue generated by the farm going to its workers, vendors and shareholders. And the farm owners obviously benefited, too. Farmhands? Not so much.)
And that was great! Good for those speculators and innovators!
What I think most have a problem with is 7 generations later, the John Deere family (<-- edit:metaphor) still controls all that capital and pays taxes at 15% on capital gains while losing count of how many homes they own.