That makes no sense at all. Public employees have a long probationary period already. Once they make it through that period, they should have basic human rights if they are being disciplined or dismissed. Collective bargaining is anti-democratic. In fact, collective bargaining actually extends work-place representative democracy.
Employees choose their representatives who meet with elected officials' representatives.
They reach agreements that are then voted on by the employees and elected officials. Bargaining involves more local folks in making decisions than are involved without bargaining. It's democracy at work. This is apples and oranges. People who say this are trying to intimidate teachers by threatening to take away one of their benefits.