How many current and prospective jobs need maths, and at what level? How much time do most adults spend using maths, and at what level, in their non-working hours?
How many pupils enjoy maths and are capable of studying it to a high level? How many people were turned off education in general by failing in the subject at school?
After 30 years working in industry and 13 years teaching maths in a large comprehensive school, I believe that maths at the level to which it is currently taught is a waste of time for most pupils and most maths teachers.
Suggested further reading: Why Learn Maths? by John White and Steve Bramall Leslie Duffen Wimstone, Green Lane Ilsington Newton Abbot, Devon