Canada Post Strike

Maybe someone out there can help me out with this. I'm not an imbecile, but I realize that there must be a larger picture that I'm missing. Please correct me if you feel I'm misunderstanding something:

The labour union for postal workers was trying to negotiate a new collective agreement with Canada Post. Right?
They didn't like the agreement that Canada Post put on the table - wages too low, pension details...
Postal workers started rotating strikes.
Canada Post said "Enough of this!" and closed everything down until an agreement is reached.

Here's where a lot of people aren't going to like me very much.
What the hell is wrong with the postal workers??? You have a good job that pays better than a lot of people. You have great benefits. You feel you deserve more. I get that. We ALL feel that we deserve more. You want a better salary, go look for one. This is a democracy. Nobody is forcing you to stay in a job that you're not happy in. You work for the government. Canada Post is a NECESSARY service for the entire country.
Get over it!

Maybe I don't get it. Please enlighten me if you feel that I'm wrong.