Precariat is defined as "a social class formed by people suffering from precarity, which is a condition of existence without predictability or security, affecting material or psychological welfare. The term is a portmanteau obtained by merging precarious with proletariat." [Source]
Here is a very interesting article chronicling journalist's experience with the "Workampers", or a large number of Americans living in the world of campers, RVs and seasonal jobs: https://www.marketwatch.com/story/many-older-americans-are-living-a-desperate-nomadic-life-2017-11-06. Many are undoubtedly victims to the age discrimination that adversely impacts Americans after the age of 50, despite the pro forma legal bans against discrimination on the grounds of age.