This is unsurprising. From what I gathered from @da_667 (former NSA TAO), the pay was terrible. Why work for the government when you can get a job making 2-3 times as much with the same responsibilities?
Add to that all of the rules that require you to be an expert in government proposals (Google "8a", "BPA", and "USG far") and you're virtually guaranteed anyone who's good and wants to be paid what they're worth will roll out.