I've been toying with the idea of creating a non-profit "social-responsibility" fund. A startup at inception would donate some fixed percentage of their stock to the fund, and the fund will later use dividends or sales proceeds to pay for retraining or retirement of those displaced by the startup.

The trouble is, the idea being so novel, I don't think I could convince any investors to get on board with it. It requires broad awareness and years of propaganda to make it a commonly accepted practice.

Alternatively, I imagine the disrupted themselves should have a pension fund or a trade union seeking out disruptive innovations and investing in them ahead of time. But in practice they don't, so that where it ends.