Di hit the nail on the head. The 'target' for saving was so easy to achieve that no 'experts' were needed, all they did was play up to said target and then gain a bit extra. It would not have taken much more effort for the savings to have been around the £100 mark.
In its defence, however, the programme did as other programmes have done, and that was to debunk some of the urban myths about food. The bit about reconstituted fruit juices v "fresh" was one, and paying top money does not always get the highest quality was another.
Next week's couple look a right pair of numpties.