What sort of jobs "in the middle" have been lost and how can they be replaced? If they aren't replaced what will happen to people?

1. What sort of jobs “in the middle” have been lost and how can they be replaced? If they aren’t replaced what will happen to people?
2. Angus Deaton says that “inequality is a marker of success.” He also says that “high-school education...are the people who just have not benefited...” What can policy makers do to aid these people without fostering a permanent underclass dependent on government for their survival?

Read the following article and answer the questions above..

https://www.wsj.com/articles/angus-deaton-discusses-income-inequality-1448302780