They sure take a lot of "breaks". And that adds up to significant time.
There are plenty of other people who are gaffing off instead of doing their work...smokers that do that are just more visible. Add that to what is becoming a socially unacceptable habit, and you've got yourself a target.
Do they really? A break in the morning, a break for lunch, a break in the afternoon, and then, if they're going to work late, a break around five? Doesn't sound excessive to me. If you're not taking one, you need to get up once in a while, move around. All that sitting is making you into an envious, self-righteous prig.