Nobody needs the assault style rifles, modified or not.  I own guns used for hunting and bear protection in certain situations.

Garbage men are essential but at the same time unskilled and qualifications are low.  At this point I could go without a garbage man as most of my waste is recycling.  What war are you talking about?

Becoming a Navy pilot and astonaut requires a high level of skill, determination and yes intelligence. Minimum just to start is a Bachelors degree from a civilian university and completion of OTS.   That's why of the roughly 10,000 who take the ASTB every year only about 10% even make into flight school.  It's an elite profession with a mandatory level of intelligence. 

Assuming liberals are lazy freeloaders without jobs is a mistake.