There's a paradox which appears when AI GDP gets to be greater than say 50% of world GDP: we're pumping up all these economic numbers, generating all the electricity and computational substrate, but do actual humans benefit, or is it economic growth for economic growth's sake? Where is the value for actual humans?
In a lot of the less rosy scenarios for AGI end-states, there isn't.
Once humans are robbed of their intrinsic value (general intelligence), the vast majority of us will become not only economically worthless, but liabilities to the few individuals that will control the largest collectives of AGI capacity.
There is certainly a possible end-state where AGI ushers in a post-scarcity utopia, but that would be solely at the whims of the people in power. Given the very long track record of how people in power generally behave towards vulnerable populations, I don't really see this ending well for most of us.