>>> "It seems to allow unlimited amount of carbs (pasta, rice, potatoes, noodles etc) . . ."
That's not wholly inconsistent with the official advice from the NHS which states "Have potatoes, bread, rice or pasta at every mealtime"
>>> "Baked beans and pulses are 'free'- unlimited . . ."
You can, of course, have too much of almost anything (even water). However the NHS advice is "Eat some beans, pulses, fish, eggs, meat and other proteins . . . "
https://www.ntw.nhs.uk/content/uploads/2017/10/Daily-planner-and-portion-guide.pdf