Actually I successfully have, just not in the US. The US has pretty hostile regulations against unions. Or maybe lacks regulations against companies squashing them.
Corporate greed can only be stopped by disallowing the divide and conquer strategy they employ. Individual bargening against large corporations only works if the employer works in good faith. So when the relationship was good they could have also formed a union and work together to have a fair footing if anything changes in that good relationship. The employees as a group missed that window and now that it’s needed the framework for collective bargaining is not there and individuals are left holding the bag.
Unions should not be demonized as a bad thing or punishment for the employer, it is a counterweight to the corporate machine if it ever shows it’s ugly head. Good employers have nothing to fear if they work together.
While terrible, the most of these people make a lot of money and could have also unionized over the past years. Covid also showed them what was on the horizon. But instead the prevailing US worker strategy in these high paying jobs seems to be “get yours”.