In most casts that results in discriminatory civil suits. Imagine a restaurant, who has even greater leverage to test the for whatever reason mentality, asking a black family to leave without stating a reason. In most places in the US restaurants have the legal right to refuse service to anyone for any reason.
Race is a protected class, occupation is not.
Federal agencies are not protected classes of citizens. In fact it is quite literally illegal to force a company to do business with the government if it doesn't want to.