The question is not just whether anyone in Holland, or Sweden, or Norway, are really poor, but whether anybody in those countries are able to enjoy the same insane levels of wealth as in the uk!
People here seem to think that people deserve their wealth, they have earned their money through hard work and (having parents who have put them through education) grind, and equally, those who dont, deserve that too....
The inherent problem, from an outsiders perspective seems to be two fold.
On the one hand wealth is desired, and earned through achievement, whereas lack thereof is not only frowned upon, but as deserved as wealth. There is little empathy for people with less, together with an accept that a small minority are entitled to their wealth without question. It is a strange sense of entitlement where not only does everyone feel entitlement to something (be it Benefits or Ferraris) but there is also a recognition that people are in fact entitled to what they have.
And I believe this is at the crux of the matter. It is accepted from the large majority that an even small majority should have most of the wealth, and to dare disagreeing with this is just branded "jealousy". And "jealousy" by definition cannot be defended against.