I don't know - I like that there are people inspecting meat for consumption, guarding our borders, designing missions for space travel, researching cures for diseases, enforcing federal laws, coordinating satellite communication and orbits, collect and distribute taxes/refunds, coordinating infrastructure development, social security and medicare, etc. etc. etc.
There's a million things the federal government does that are useful. Yeah, there's some waste in there - but to randomly attack with "two-thirds of the federal govenrment serves no good purpose" is just hyperbole. It only feels that way because the majority of the government is actually still up and running today. I almost wish a real shutdown would happen so people like you would realize how many functions the government really does serve.