here in Brazil, guys, the shining positions are R, U and LM. In this order.
In old times (and we are changing this slowly - daniel vasquez and I) prestige of position was everything. So the "old" officials in Brazil had to control the clock because the least experienced officials were pushed to the deep positions (SJ, FJ and BJ). They had the "power" to control time, and they couldn't rely in those "dumb" newcomers. Long story, but I can illustrate with a shorter one.
In a game, instead of being the R, I was the BJ, so a pal could be the R as the league owner wanted. I moved to BJ, and the supracited league owner (yes, "the" man) asked me: "why didn't you go as Umpire? Are you afraid of it? Why are you taking that lousy position?"