I can only speak to what I have seen in California. At the high levels, a high percentage of government workers don't have oaths. They know the penalties for treason of oath is worse than working without an oath, so the people who know they are committing treason of oath by ordering underlings to do certain things take a calculated risk. Usually low level workers who just follow orders have proper oaths in place. Edit to add: my experience has been that these underlings are used as patsies. For example, a Deputy Chief Counsel at the CA income tax agency wrote me a letter that contained fraud. He made an underling (who had an oath) sign it instead of signing it himself.

I can only speak to what I have seen in California. At the high levels, a high percentage of government workers don't have oaths. They know the penalties for treason of oath is worse than working without an oath, so the people who know they are committing treason of oath by ordering underlings to do certain things take a calculated risk. Usually low level workers who just follow orders have proper oaths in place.