Unsustainable

From the PDF by Piketty and Zucman, linked by Carola Binder.

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The only way to save more than you grow, continuously, for 40 years or more, is to replenish the circulating money by printing or borrowing more. Otherwise there's soon nothing to spend, and the economy shuts down.

The problem here is not the printing or borrowing. The problem is the saving.

// Related post: Disastrous, cumulative and far-reaching repercussions of saving