

Imo being left wing should at the absolute bare minimum require supporting the abolition of private property and ownership. Unions are fundamentally a compromise between labor and capital, therefore supporting unions is more centrist. An example of a left wing position would be supporting revolutionary workers syndicates.
If you asked a Appalachian coal miner in 1921 they would say that the abolition of private property is the absolute basic nessesity for any leftist movement