"Never better"

Morgan: Twentieth-Century Britain: A Very Short Introduction.

We all know something about 20th century Britain anyway: involvement in the 2 world wars, the Beatles, the decline of the Empire, Margaret Thatcher, punk rock, Falkland war, the New Labour, death of Princess Diana. But this book puts the stuff in perspective. Why, for instance, did British pop music become so influential in the 60's? Naturally because the talent of the musicians, but if the government did not invest in art schools, they could not have become musicians in the first place.

The phrase "you've naver had it better" was actually used as a political slogan in the boom year after the second world war. The author justifiably says the same about the last years of the century. After that?