During World War II, the famous macroeconomist John Maynard Keynes wrote about an idea to help tame inflation: compulsory savings. The idea was to stash away a share of workers' paychecks into a government-issued savings account that could only be used after the war. This would help control inflation by reducing spending.

The original proposal didn't go very far, but with inflation still running hot, one economist thinks it's time to bring that idea back.

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