[sandworm101]

It seems to me that the intelligence communicate uses lie detectors less as tests for nefarious activities and more as personality tests.

Let's assume that lie detectors actually work. To "pass" such a test you have to be reasonably certain about your answers. Have you ever passed information to the enemy: Yes/No? Is everything in your application truthful? Only some people can be completely secure about there answers. The more knowledge and experience a person has in an area, the more the likelihood that they cannot give that yes/no answer. So what they get is a bunch of young, mostly male, kids who are not the type to self examine. They are sure that they are correct, that they have done no wrong. That infeed might explain much of the direction that the community has taken in recent years.

[pavel_lishin]

Or perhaps they're just selecting people who are good at lying.