It never stops. On his now-tired quiz show QI, everybody's favourite bi-polar Jewish homosexual luvvie pronounced that "the evidence shows" the fundamental source of happiness to be equality of income.
There is no, repeat no empirical evidence whatever to support that blithe statement of faith.
Envy and resentment are undoubtedly key components in unhappiness, but to argue the opposite is the classic logical fallacy of denying the antecedent. Even if you eliminate inequality of income, the envious will still resent those more intelligent, better looking and more talented than they.
In other words the poor in spirit will always be with us, no matter how much money they have.
For evidence, look no further than the mean-spirited, intellect-free diatribes published by well-paid journopukes in the Guardian every day, or the drip-drip of dishonest socialist agitprop across the entire range of programmes broadcast by the extraordinarily privileged Bitchy Boys.
As Fry, given his condition, certainly should know, what "the evidence shows" is that a sense of well-being comes from serotonin production and uptake. About half of it comes from your basic genetic endowment, and much of the rest relates to personal or vicarious hope and achievement.
Not all addicts are born serotonin-deficient, but the repetition of artificial highs causes the brain to increase the number of serotonin receptors, so the effect is the same and becomes cumulatively worse.
There does seem to be a very close correlation between being naturally dysthymic (chronic, low-level depression) and professing a belief in socialism. I wonder if the hypothesis could be tested scientifically?