Land After
What you are talking about is loyalty. Unfortunately airlines seem to think their employees owe them something for employing them yet continuely let those employees down. You just need to read these forums to see how many airline staff have been Sh@t on.
Why shouldn't someone take more money to benefit him/herself and their respective families. I very much doubt you can find a company prepared to offer you a cast iron guarantee of a job for life. The tieless wonder kids at easyjet will drop you without a second thought to you, your career, family or future, anything. Its the classic case of "i am allright jack". You want loyalty and respect from your employees try showing them some.