This is based on the assumption that you have some degree of worker solidarity at your workplace. Assuming that, if you have bosses who are making life unbearable, you and your coworkers can just do a one day strike from time to time. Just make sure everyone knows to meet up, for coffee or something like that, about a half hour before the start of your shift. That way there is no risk of anyone double crossing the group. You all stay at the agreed upon location for maybe an hour or two, maybe have drinks together and get a bit tipsy so that no one can have the option of going into work late.