America has recently waved the security clearance process entirely for certain roles, so currently there isn't anything that is disqualifying right now. Prior

America has recently waved the security clearance process entirely for certain roles, so currently there isn't anything that is disqualifying right now. Prior to that change, lying in the clearance process was the one thing that was absolutely disqualifying. As you noted candidates are incentivized to lie, and so "did you lie here, where it is likely to benefit you?" becomes an effective screening mechanism for people who are willing to compromise their ethics for personal gain.