This is SO SILLY. There are historical murals which depict, in part, labor - that I can think of at the Pike Market (includes Asian farmers), at a hospital (nurses that are nuns), at our statehouse (WA.) There are historical murals that depict labor as part of history - in West Seattle, on Roosevelt Avenue in Northeast Seattle, and more. It's not just Seattle - I've seen such murals in travels throughout Washington and Oregon, in small towns.
The Maine mural sections were removed for not being "pro-business" enough.
This is so Orwellian and stupid. History is being covered up. We'll have to go back to the time of the Wobblies, of Black Friday in Everett. Mexico has a proud tradition of murals, often depicting labor history. Workers are the foundation upon which everything else is based. Check out Diego Rivera, Orozko.
From the Pike Market mural (depicts Japanese farmers):
I will add more murals as I go through my collection.