Comment: But you have to consider government spending

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In reply to comment: eh, still missing my point (see in situ)

But you have to consider government spending

I see your point on consumption, i.e. current vs. future consumption.

Government spending steals consumption from the future and spends it now in order to "stimulate" the immediate or immediate next period. It draws DOWN investment and, hence, future prosperity (future consumption). It lowers the trajectory of productivity growth arising from investment (from the trade off of current consumption vs future consumption.)