Who on earth has the resources to create true AGI and is interested in using it to create this sort of utopia for the masses?

If AGI is created it is most likely to be guided by someone like Altman or Musk, people whose interests couldn't be farther from what you describe. They want to make themselves gods and couldn't care less about random plebs.

If AGI is setting its own principles then I fail to see why it would care about us at all. Maybe we'll be amusing as pets but I expect a superhuman intelligence will treat us like we treat ants.