I think the point is, it's extremely likely you'd end up in a situation where someone intentionally introduces a hard to detect flaw. If the flaw is then sold to a government agency:
1. The person who introduced the flaw will not suffer any consequences.
2. You've now set the precedence that it's free game for people to intentionally leave holes in software and get paid to do so.
This seems very unlikely, since intentionally introducing product flaws is at the very least an incredibly damaging tort, not just against your employer but against everyone who ends up using the software.
