In the United States, degrees that were once delivered in four years are more often delivered in five. While some explanations for these delays are valid, they share a reference point of the four year calendar as if it were an unquestioned standard rather than what it is, which is nothing more than the product of a long past society and economy that possessed very little knowledge, and some of that incorrect, about how to convey knowledge and competence efficiently.
Old habits die hard, perhaps hardest in the university classroom. Higher education's well known conservatism will have to be pushed aside, perhaps aggressively by market forces. Once initiated, the path to efficient learning, shorter and less costly degrees, and better learning outcomes is clear and uncomplicated.