You might call it semantics, but I think you'd be more accurate if you had talked about spreading the global net worth *equally* rather than fairly.

Fairness is, like beauty, in the eye of the beholder.

Also, comparing net worth between different regions, let alone different countries, is far more complex than simply counting dollars.

If the median home in the US costs over $350k, and in the third world costs a minute fraction of that, comparing net worth in dollars fails to capture the different purchasing power of dollars between the two.

Yes, the median house in the US is bigger and fancier, but there aren't many realistic options for buying even an extremely modest home for what you'd have to pay in the third world.

Having said all that, I suspect you're right when you say that much of the argument about redistributing wealth comes from jealousy and a desire to benefit personally from such redistribution. Not from a true desire for everyone to be equally poor.