We should be teaching critical thinking skills, then giving them tools and materials along with, most importantly, a problem to solve with a set of constraints. Now that is what creativity is all about. The article is from the UK point of view so I can't speak for them but in the States here we need something more like I described. And really, students aren't too overworked. They're just made to memorize and vomit up later useless facts for standardized tests instead of being taught critical thinking or problem solving skills.
Here, teachers get the short end of the stick. Especially the ones who are really passionate about teaching. I've got several friends and my mother who are all finishing up teaching degrees or have just started teaching and they tell me all the time that they aren't given the tools they need to properly teach their students.
Here we're teaching what used to be middle school math in the 50's in college. I'm not sure if overworked students is a problem. At least not in the U.S.