a) Refs don't deal with suspensions, the NHL VPs do.
b) They did do their job with Chara. They called the interference penalty, and that's what the hit was, just an interference (hitting a guy who no longer had the puck nor was chasing directly after it) that, because of where they were on the ice, ended a lot worse than it normally would, anywhere else on the ice.
c) The Crosby hit was a collision, 2 guys who didn't see each other bumping into each other on the ice, and while the result was unfortunate, there was no penalty for the refs to call, and therefore nothing to suspend.
d) As for crooked refs, it's the age-old excuse. However, the bad calls go both ways, and if you keep track over the course of a season, they tend to average out (for instance, the Caps getting hosed in Dallas on a waived off goal for no reason, and then winning on a similar call against Tampa). You notice it more when it hurts your team, but the fact is, refs are human, and as such miss calls and make mistakes (and don't give me the "it's obviously 'this' in slow motion" because the refs don't get that advantage, so the only relevant replays are the full speed ones)
edit: Quizzard- that "the player should be suspended until the injured player returns" argument sounds good in theory, but wouldn't work for the following reasons:
1) Jamie Heward. Took a hard check from Ovechkin. Heward was in his 40s, Ovechkin was in his first or second season. Heward was injured on the play, and decided to retire. As a result, had the ref called a penalty, Ovechkin's career would've been over, simply because Heward decided that enough was enough
2) Star player hits a minor league call-up. Call-up is actually fine to play again, but his team's coach sees star player's team in the near future, or it's a playoff battle between the two and this is a chance to keep star player out, giving the team with minor league player an advantage, since they aren't losing much by having a call-up sit out. And most coaches would certainly be willing to take advantage of this gamesmanship opportunity.
3) What if they player who committed the hit is young, it was a dirty hit, and it ends the other guy's career? Should the hitter REALLY lose a chance at a career because of one mistake? One bad choice? Yeah, it's unfair to the player who was hit, but that's how life works, it's unfortunate, and, as Todd Bertuzzi has proved, sometimes players do learn from their mistakes, and even if it was a huge mistake, people deserve a second chance.