Huh? If you choose to work for a company with any size, your job description is enforced by a committee. It's just a committee of managers.
If you don't believe me, try to stop working on your assignments and instead work on the cool new project that really interests you.
unless you're self-employed, I have bad news
It often came up in the company Q&A, and it was often ignored or glossed over with an answer by Sheryl detailing how contractors "actually had it pretty good". That is, unless there was recent public press coverage how they in fact did not "have it pretty good" in which case the answer was your usual "we're working with our outsourcing partners to make sure every contractor has what they need to do their best work", etc.
I am an engineer. I might've been more difficult to hire, but I wasn't doing work that was nearly as important or taxing as content moderation contractors, for example. Revert my work and some obscure internal metric somewhere is a little worse. Revert a content moderation contractor's work, and thousands get exposed to suicide, CSAM, graphic violence, etc.
I know the value of an employee at companies like this is determined by how difficult they are to replace and how their work affects company profits; "anyone" can respond to content reports but not "anyone" has the technical knowledge I do. I just think it's wrong that people working on something so vital to Facebook have it so much worse than the rest do. Facebook could and should do a better job rewarding and protecting the people doing the hard, dirty work— it definitely has the means to.
Unions are only a major benefit for work where you can't excel and talent and skill are less of a differentiator.
1. It disproportionally affects those who have no other option. There's hero stories of pregnant woman outperforming up until the day they deliver, but this is hard to achieve and there's even a factor of "luck" involved.
Some pregnancies are more tranquil, others are riddled with visits to the doctor, morning sickness, aches, pains, allergies, sleep problems, emotional swings, rashes, etc. It's hard to be "top of your field" when there's another human growing inside you.
2. This argument assumes skills are perfectly measured and employee benefits are based solely on skills. Even in the most objective companies there's subjectivity and politics. Not everyone has the skills or time to bargain. Not everyone shares hobbies or values with the boss, and wants to create a close relationship with them.
3. If the base compensation for all employees in a field rises, the compensation for out-performers will likely rise too. One can't assume "only" benefits those who "can't excel" at their job.
If a contractor isn't happy with the work or conditions then they should move on to the next job.
Maybe that’s the only decent job they could find? I know tech employees live in a bubble where jobs are plentiful and well laid but that’s not the world most people live in. And having lived through the aftermath of the .COM crash things can change for tech people very quickly too.