Sunak believes that all school pupils should study English and Maths to the age of 18, plus a range of other subjects according to a pupil's preference or plans for his/her future.
My first thought was, why re-invent the wheel? The International Baccalaureate does that exactly, except that it also insists on another language. It is very tough, but 18-year-olds who have done that course are so much better educated than those who have just done three or even four A levels.
One GC did it, struggled but did well, younger sibling decided not to do it, but to concentrate solely on the A level subjects needed for the university course aimed for.
My second thought was - it's all very well for you, Rishi Sunak, with your rarefied Winchester College education.
It was hard enough devising courses to cover differing abilities at GCSE. There are quite a few pupils for whom a lowish grade at GCSE is a decent achievement. To do the same for a "British Baccalaureate" to be taken at 18 would be a massive undertaking and a challenge for teachers.
Having said that I do see that everyone needs to acquire an adequate level of numeracy. People need to be familiar with how banking, savings and mortgages work, also understand about things like NI and pensions. Calculus for all? Not sure.