there is an underlying culture that the top table deserves all stops being pulled out, while the bottom table shouldn't hold anyone back and could settle for functional skills in adult education
You are very welcome to come to visit my classroom any time - mixed ability seating predominantly, with some flexible grouping lesson by lesson - to see whether your perception that 'the top table deserves all stops being pulled out' has ANY basis in reality.
I would say that, as no-one is ever going to say 'actually my child has exactly their fair share of teacher attention - no more and no less', I settle for equal numbers / proportions of parents, over time, complaining about 'not stretching the most able' / 'neglecting the middle ability' / 'settling for low attainment from those of lower ability' / 'not caring about children with SEN'.
It would obviously be NICER if everyone said 'yes, i can see you're doing your best to balance the needs of all children', but since that is utopia, I'll settle for a balanced diet of complaints...
Interestingly 64% tally with the 65% who pass GCSE English and Maths. Norm referenced exams...do you understand these now, cakes? We have explained it enough? The government sets the proportion of children who 'pass'. It is not a measure of an absolute standard, but rather the measure of what the government will allow.
If you define what 90% of children should be able to do at the age of 10 /11, and set tests which are referenced to that absolute standard', then 90% of children will pass, and that proportion will rise slightly each year.
However, if you set a curriculum, and then set tests which only 64% of children are ALLOWED to pass, then only 64% will pass, REGARDLESS OF WHAT STANDARD THE OTHER 36% HAVE REACHED.