Given I have some understanding of Economics I actually don't know that. The fundamental misunderstanding you make is that a government like that of the UK can spend money "we don't have". We're not Greece, nor could we become them. We have as much money as we want as we control our own monetary policy.

Not quite, as grammar schools intake were based on academic success, not potential. In order to truly take advantage of the prospects of grammar schools you need to ensure that everyone has access to a suitable education to qualify and deal with the issues that plague inner city schools.

You actually have to engage with the issues within poor and impoverished areas, that impact childrens education - Including school programs in low attainment schools aimed at getting 'the best out of the average' as well.

The problem of grammar schools was the high funding of the grammar schools and the relative abandoning of the comprehensives / secondary modern. Both have to have a very active focus and means of achievement of opportunity.

The average kids need skills, jobs and life chances too.

Its not just about excellence, it has to be about producing functional adults out of broken areas.

"One Nation Under God, has turned into One Nation Under the Influence of One Drug"
[Link]

A bit selective isn't it?

There is an issue with the demise from coal mining and other industry but times change. People have to adapt. Either themselves or their children.

Adapting without opportunity

So "anti-establishment" he's parachuting his son into a safe Labour seat. Lol.

So what is the deficit?

More importantly, it is not realistic to throw money at an ever increasing problem involving a highly inefficient organisation.
The use of temporary emergency staff for example must be addressed.
You can argue about what percentage of GDP we can spend but ultimately tax or NI would have to rise. That would be acceptable if demand for health care did not continually increase. With current rates of population increase and life expectancy that is not happening any time in the coming century.