The thing is with globalisation we essentially have global government already, expect a confusing and shadowy one headed by elite institutions.
Absolutely not (doesn't trust that much power in that centralised of a government)
A world government doesn't have to be centralised. Ideally power should be taken both upwards and downwards from national governments - why is it any better for someone in rural Queensland to be ruled by Genoa as opposed to Canberra?
Absolutely not. Even if I did support it, it is extremely optimistic to think this would actually work.
Literally something you could say about the creation of centralised nation-states to begin with.