That's funny. For starters, it's a 180 day school year. That's 36 weeks. There are an additional ten days on all contracts. So, that's 38 weeks. Also, teachers rarely work just 40 hours. Try a minimum of 50 hours a week. That's coming early for either morning duty or just to prepare, and staying late for either afternoon duty or to get work done, and prepare for the next day. Now add an additional ten hours per week for work done at home on their own time without pay, and you've got about 60 hours per week. So at 60 hours per week x 38 weeks you're looking at 2280 hours annually.
As of the latest survey in 2004, the national average was 46,752; not 58,000. So, 46,752 divided by 2280 is $20.51 per hour. This is for a job that requires a four year degree for entry level salary, and other specialized degrees requiring up to an additional four years of school and many years of service to get the higher pay with which this average is calculated, and many hours of professional training to maintain certification. We haven't even begun to discuss the money teachers spend out of their own pockets for shortages in supplies that are necessary and must be bought regardless of whether or not the system reimburses the teacher. So your quote about $58,000 being a conservative estimate is not really true.
Yes, we should be good stewards of our tax dollars. Yes, police, firefighters, and the military also deserve to be compensated fairly for their contributions to society. However, I detect an anti-teacher tone in your post which has resulted in a distorted view of what is really going on.
AND every single teacher uses a ton of their own $$$ for classroom supplies that their budgets do not cover (not even CA lottery education money).