Gary Marcus backs WSJ skepticism: 9%-of-GDP AI spending faces a natural ceiling
GaryMarcus · x · 2026-10-05
- A WSJ piece questions whether Americans will really spend as much of their income on AI as the massive capex push implies — roughly twice what the nation pays for all energy, or all computers and software, and seven times combined spending on phone, streaming, and internet services.
- It argues even transformative technologies hit diminishing returns: each additional dollar yields less productivity or enjoyment, imposing a natural ceiling on spending; the open question is where that ceiling sits.
- Gary Marcus replied with a blunt "no" to the 9%-of-GDP plausibility question, signaling agreement that the AI investment boom cannot sustain such spending expectations.
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