Unions, without the strong backing of government, seem to be the way to go.
I don't think enough business people understand that having a well-defined legal framework for labor disputes is beneficial for their own safety and security, unless their expectation is that government ought to intervene on behalf of business but never on behalf of labor.
Joking aside a lot of LLM's won't even let you ask critical questions about unions. They may have become more lenient in recent versions, but I know early llama and chatgpt models wouldn't answer questions about decertification of unions, or whether they could taxed. You could never get an LLM to say anything critical of a union just by using system prompts.
I'm highly skeptical of the idea there are a bunch of conservative bots running around, you would, at a minimum, have to retrain an existing model to get them to argue in favor of most right-wing topics. You certainly couldn't do it with system prompts.