aren't the middle class exactly the kind of people who are into esoteric spirituality? seances, tarot, etc all kinds of crank beliefs etc. i seem to remember Tooting was a hotbed of witches. middle aged women running around starkers in parks after dark.
perhaps that's not the kind of magic Luke is talking about
i know there's also a sort of aristocratic tradition of dabbling in the occult or not dabbling but pursuing it avidly, buying black arts bibles that cost 1000s pounds, antiquarian wotnot
Bowie is ultra middle class suburban (the male Kate Bush in fact, to reverse the usual cliche) and he fell for every kind of magic, occult, spiritual, mystic thing going. just about the most credulous individual in rock, which is saying something.
or Genesis P. or jonh balance, who went to boarding school.