You don't get to trample over people's lives just because it's the government. If the government has unfair employment practices, I'm happy when those who are treated unfairly get even.

And that's a full year of "teaching", as in, with a classroom of kids. Teachers usually have a few weeks of training and work during the summer as well. But this is all offset by the fact that they are usually paid less than market wages, even when accounting for benefits. Although, defined benefit plans are becoming rare in both the private and public sector.