Jewish people aren't endowed with a higher intellect at all Dorcus, there are cultural and environmental reasons for successes and failures and I have read about both as regards them and others, false eugenics is a dangerous route to go down.
The Labour party is fast becoming the party of the middle classes, appealing to civil servants of all grades, teachers, nurses, office workers, middle management etc, if we were having this online chat a few decades ago yes but moving up to middle class I don't think is one of them at this point in time.