I and some work friends made the mistake of disclosing our salary between us. Me being the one that earns more.

Our friendship and even work relationship was never the same again.

I would never tell how much I earn if I had the choice to go back. I do believe they should know. But it hurts our work relationship on a daily basis.

I had that happen too but the difference was trivial like a couple hundred but still bothered one of the people. I think the only way to share now is just post on glassdoors.

Yes, even minimal differences bother people.

I've had such a different experience than you. I feel that being friends with co-workers has always been more about mutual aid than competition.

Probably depends on the job.

We devs always got along well, even the idiots were kind of included.

But I had the impression, things were different sales or the management team.

I don't know, I tend to cross over into whatever part of the business if someone seems cool and just ask them to grab lunch or a drink. One of my closest friends is a management person I worked for and asked to grab drinks with when she quit. She's 20 years my senior and now we take girls trips and know each others family and friends. I think it's all about putting yourself out there and occasionally sitting through a painfully awkward lunch.