Its well beyond the issue whether management notices or even cares about the rate of resignations...who really cares what they think anyway? It is only about what it takes to make you..the individual pilot content. For some, that could mean a little respect and recognition for ones contribution to the bottom line and the sacrifices made therein. For others money is the driving force, for some maybe its the joy of actually flying an airplane and actually being a pilot instead of a robot.
Whatever your motivation to leave is irrelevant to the managers...just the individual so forget about trying to "stick it to these stuffed shirts". They will always find a way to protect their own asses. They will hire less and less qualified people until people die, a hull is lost and most importantly, they find themselves in the spotlight...very embarrassed, trying to explain why the best airline, with all that profit couldn't attract the best.
Its a time bomb and they know it.