You don’t really expect all those Census Department employees to just go home for nine years between Censii, do you?
Sadly the scotus has ruled that what the census does not violate the 4th nor 1st amendment.
All census employees from regional manager on down are 'temps'. The field workers are employed about three to maybe six months and make a tad above minimum wage. There is preferential hiring for minorities, women, disabled, and veterans. Most field workers get three days of training by the people hired three days before they came on board. I would call it the "Phoenix" personnel system, where every ten years the staff rises from the ashes of the previous staff (or maybe a plague of ten year locusts?).
The management levels are all politically connected, work until the census is officially wrapped up, and get serious salary for basically showing up. Most were not management in their "real" jobs.
Regards,
GtG