"...The people who say they are qualified to micromanage the affairs of the world...."

"...can't do arithmetic well enough to be a successful bank teller, and can't figure out whether to put an apostrophe in it is."

I've often had these same thoughts--that those who cannot do, teach, and that those who cannot teach, regulate--but am rarely able to coalesce these thoughts in my own head, much less get them out onto (cyber)-paper.