This is an interesting piece, though one-sided.
The Guardian’s Senior Economics Commentator
discusses puts across the idea that economics teaching has been dominated by the neo-classical school to the exclusion of other schools of thought.
If you want a good round up of the different schools of thought have a look at Ha Joon Chang’s “Economics: A User’s Guide” which devotes a well laid out chapter to it.
Roger Backhouse’s deliciously factual “The Penguin History of Economics” covers it much more detail.
As someone who would like to study economics at graduate level, the Radio 4 piece is quite depressing. It reminds me of the point during my law degree when I realised that it was a vocational, and not philosophical, programme of study.