Over the years, more or less radical comrades have made music and some of it has gained at least some popularity.
The post war period until about the 60s had folk-influenced singer-songwriters of various kinds like say Hannes Wader, Ewan MacColl, il Canzoniere delle Lame, etc.
The 70s had brought new genres to the forefront, with punk, reggae, ska, etc.
The early 80s were a time of a bunch of English new wave Bands singing about the horrors of contemporary capitalism and getting really popular commercially
The 90s still had some leftist music, say the Coup, Manu Chao, Chumbawamba, etc.
But what then? Of course, the quantity decreased because of what happened in 1989-1991, but what's even around?
A bunch of punk, rap and obscure metal, I suppose?
I'd love to see what recommendations you have, comrades.
For a very different sound, check out former Propagandhi guy, John K. Samson or his old band, The Weakerthans. Definitely some leftist themes here and there. For instance:
https://www.youtube.com/watch?v=BatToG_RKrg
"So when they wonder where the money went
And we can't swim here anymore
And bankers warble algorithmically from the shore
The stations pump the new austerity
The Ogallala Aquifer and crackling California reservoirs making sure
Priced out of that old neighborhood for good
The payday lonely pray in parking lots
A one-bar wi-fi kind of town
The pilot flares oppose another night coming down
Coming down"
The solo stuff is some of my favorite recent music. He's a terrific lyricist.