Like most people, I read Jaja's post and thought how unfairly her boys had been treated. It is a seriously unfair system.
However, its worth considering the government's point of view on this. Reading between the lines on Ed Balls statement and from what I've learnt from Mumsnet's education threads over the years, I've deduduced the following:
Governments see state education as a tool for improving social mobility by increasing opportunities for our most disadvantaged children.
So, for example, this impacts the policy for school starting age. Whilst, for most children from families with good parenting skills, delaying the start of formal education (year 1) to say age 6 -7, would do no harm and might actually be benefical, it would seriously harm those children from the most deprived background.
The 'optional delayed start' for immature summer born children would likewise, be good for the childrem of parents who understand the benefits. However, it will disadvantage those children whose parents don't understand or care. So, a 'deprived' summer born child could end 15 months younger than the oldest child in class. As I believe happens in some parts of the US.
This doesn't excuse the lame 'Sir Jim Rose' (and to be frank Ed Balls) reponse to this problem, and I think the idea of a campaign is a good one!! Just because there are no easy answers to this, doesn't mean we should let the government get away with it.