You have this behavior non union as well .
I am not directing this at you! I've learned it myself the hard way. I still work hard but know some do and some don't. I also know if you kill yourself at work it becomes expected of YOU, and you screw yourself .
Pace yourself
I have a few friends that bitch about " doing all the work while others slack"
I tell when in Rome do as the Romans do.
Get it ?
Some people do this to themselves. Not a union ,or not a union ,or some alien force , or brain worms. Some people do work really hard and just don't understand many do the minimum.
Sometimes working above and around everyone else does get you noticed. It did for me, and I wasn't really trying. I just did good work I guess. (Or at least the think so?)