The sad truth is Congress is the biggest offender of poor network security practices. Every time they bring in Equifax, DHS, etc to explain why they didn't practice basic IT security due diligence or due care I am reminded of the time smart people were hired to implement basic network security for Congress. Once they realized Joe in IT (who was hired to keep hackers out) can see Congressman Bob has a foot fetish, fish fetish, whatever, Congress told IT to turn everything off.
There were more serious allegations against the individual, but the gov't dropped those claims. All that was left was the fact this individual had extensive access to Congressional servers.