I, once again, was called into my Center Managers office for speaking up during a P.C.M. when my supervisor asked if anyone had any questions about the injury information they had just informed us about. I suggested that if the center would add the 2 to 3 more routes (as they previously said they were going to do, but haven't) and get as many drivers in at 9 hours (also promised) then drivers may not be as mentally and physically fatigued as we are now from being over dispatched and being given splits. Maybe this would bring down our injury rate. So, off to the office.... I was explaining my position on this issue to the Center Manager, but they just rolled their eyes and kept cutting me off when I would point out that they claim an injury cost the center 100 thousand dollars a year and that adding just one driver to ease dispatch would be much less than that (not sure if that statement was true in regards of having to pay insurance and other cost for a new driver, but it's what I said.). So, I turn to my steward (who's hanging his head) and begin to make a statement. My Center Manager cuts me off again and states "Your here to talk to me, their just here to listen.". I reply, "Alright then, let's talk then.". My Center Manager gets up and says "I don't have time to talk to you about this, we're done, go to work.". Question(s): Is a Center Manager allowed to disallow me from communicating with my Steward during a "meeting"? Is the Center Manager able to direct the Steward to not intervene during a meeting. How much exactly does it cost U.P.S. for a "Time-loss'" injury?