[VonGallifrey]

I was easy enough to fire for my former employers.

You would probably say that it isn't EASY because in the US it is much easier to do. You might not be able to do it immediately without notice period unless the employee does something really stupid or illegal.

You can however fire someone any time when you give them the notice period defined in the employment contract. You might need to give them a warning that they are underperforming first so that they can fix it before you fire them, but after that, you can just fire them.

This happens ALL THE TIME, but it isn't done as a mass/group action. If you have a problem with an individual then the individual gets fired.

Also, in the first 6 months, you don't need any reason and the notice period is shortened to 2 weeks.