Should the poor subsidize the rich?

Indur M. Goklany writes in The Commons Blog:

[T]he numbers provided in the [Stern] Review and the analytical sources that it relies upon indicate that despite any climate change, future generations of both the developing and industrialized countries will be far better off than the present generations inhabiting these areas. [...] [U]nder the richest-but-warmest (A1FI) scenario, "net" annual GDP per capita in the "developing" world, after accounting for a 20 percent loss in welfare due to climate change, would be over $53,000 in 2100 compared to $875 in 1990 (the base year used in the IPCC scenarios). Under the poorest-but-less-warm (A2) scenario, the net annual GDP per capita for developing countries in 2100 would be $9,500. [...]

[T]he Stern Review would have today's poorer generations subsidize tomorrow's much wealthier generations to make them even richer.