The Federal Center in Lakewood is the largest federal employee center outside of DC. It houses the alternate locations for Congress and many federal agencies in case DC is a goner. Much of it is underground and “super secret”.
Colorado is home to many federal and DoD facilities, not to mention missile, satellite, and nuclear weapons companies. More than a third of Colorado’s economy is federal money of some kind.
If you think about it , would it not make sense to centralize so you can get a better grip on those pesky westerners. And it would put them dead in the middle of their FEMA regions. They are building their nest. Just have to get the environment right.