alt Hacker NewsAt any moment some change outside my control could occur and my place in society would change. Right now I'm pretty self sufficient and don't really need the support of others in day to day life, but that can change, and there's nothing I can do about it. Seems like a good idea to use this opportunity to try and improve things for everyone, even if you don't care about others, just in case your place in society changes. (I actually think it's neat if we try to improve things for everyone for everyone's sake tbh but I get there are people that do not have such empathy)
It depends on the job and country.
In Western Europe workers are very protected so unless you are in a low end job or specific public sector job and might gain from collective wage bargaining there is often little actual benefits in being in a union, taking into account that membership isn't free.