I ask this because I’ve recently gotten into creating a union for my work place and noticed that North America is really the only place where a Labor or workers party never took off.
It would be probably be doable to unite the unions into a political party similar to the UK Labour party after the world wars. The major point is, is that the party would have to be purely an economic party with each individual member deciding for themselves how to vote on social issues.
No social platform at all is a serious problem. I do think messaging should focus on economics first (since we have precious little mainstream discussion of actual consequences of economic policy in many places, and social issues are cynically exploited by free market-touting establishment types as a distraction), but a party that pretends systemic hierarchies and marginalization don’t exist is just mob/majority rule and not truly leftist.
Whatever a hypothetical person accepts happening to people they want to consider “beneath” them, they are also accepting for people they do consider to be like themself. Just a matter of time.