He is not insulting these janitor jobs. He is making the important point that neither STEM workers nor janitors have job security -- but there is a difference here. Janitors dont have to go to school for four years, constantly train in the latest technology, etc etc.

Q: Do you know what an EULA is? A: Meow Q: You know, those end user license agreements you have to accept when you buy or download certain software? A: Meow Q: If you built a device that would allow a cat to accept an EULA, would you be legally bound by the EULA? A: Meow Q: What if you got a small child to accept the agreement, would they not be bound because of their age? A: Meow Q: Do EULA's violate any sort of doctrine of first sale since they require you to agree to the license after you've bought the product and limit what you've gotten if you don't agree to it? A: Meow

Low capital gains taxes create jobs and wealth. OK, why then, after eight years of capitalist policies and low taxes, do we have record unemployment and why is my 401k half of what it was before? Why hasn't the S&P moved an inch since Bill Clinton left office? Seems like low-tax theories show up everywhere except in investment returns.

And Obama thinks it will take 10 whole years!