When I see someone's resume who jumps from engagement to engagement I usually sort them out. Not a good sign. They learn on my cost and jump as soon as responsibility kicks in. These people have to make career somewhere else.
I mean, that's fine, but you also kinda gotta understand that that is exactly what the industry rewards. If somebody's there longer than two years, there is a very real chance that they have passed up at least one significant salary bump (up to a point, of course, it doesn't continue forever).
If you're offering 10%-a-year raises, etc., what you're saying makes sense to me, but otherwise people are going to leave because it's stupid and self-harming not to.
