“I, Daniel Blake” is probably his most relevant work to what you are asking but it is a masterpiece at illustrating the damage that conservative austerity policies did to the working class part of British society.

It might be worth noting that his movies are almost exclusively centered around the UK.

Edit: “Sorry We Missed You” also centers around the struggles of a working class ‘Amazon-esque’ delivery driver in the UK.

Anything Ken Loach.