Some HN users are apparently very touchy about this, so maybe a gentler way to state it would be:
> It is only possible to see labor solidarity as "charity" if you are privileged enough to not depend on that solidarity.
Of course, accusations of privilege themselves are subject to pants-twisting and fits of downvoting moderation-flagging rage.
"Please don't remind me that I'm privileged because it makes me feel icky feelings so I will get ANGRY instead" seems to be a natural human reaction.