Well, yes. According to the UN they are anyway. After all they all agree Al gore is bang on with his global warming theory. Those "top scientists" even gave him a nobel prize, so it HAS to be true.
True, MASS is independent of gravity, but weight isn't, and thats what we are talking about.
Um, kilograms are units of mass. Newtons are units of force, which has the same dimensions as weight. These are 1 kg masses (supposedly) of stuff, not so many Newtons of force.
The pounds is a unit of force, but the kilogram isn't.