And to think that you can control inflation at 8 to 10% is absurd. High inflation invariably tends to spiral out of control and it can only be brought down again by very painful measures.

Not really. It is as far as I can tell a common idea that inflation is driven mainly by expectations so inflation triggers more inflation until you get to hyperinflation. But I don't think it matches reality. Hyperinflation tends instead to be a phenomena of its own and high stable inflation is possible.

Here is for example Inflation in Sweden 1831-2012

You can easily see a number of external events there - WWI&II, the 70ies oil crisis - but even those do not lead to out of control inflation.

Do you have any examples of high inflation spiraling out of control from mainly internal factors like inflation expectations?

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