FIA vs Redbull (0-1) - episode 1

First episode FIA vs Redbull or Ferrari vs Redbull or Mclaren-Mercedes vs Redbull(who knows?!!?) ended again with RB7 domination and i'm afraid this rule(same engine mapping in Q and in race) is against the drivers and will not let them to do incredible records on a lap(even though we have a new lap record in Valencia 1:36.975 made by Vettel), but maybe this is better for race day when someone will get an engine failure.
FIA, or who ever is in charge got to find another rule to block RedBull cars and now we are waiting for episode 2.
I just wonder: why this rule?