Then I'm genuinely confused. The meaning of that sentence, to me, was that pillaging has helped with the famine. It would have been a sentence that was consistent with your previous one, except for the "decades" rounding error. Isn't it not what you meant?
yes, pillaging the rest of Europe helped with famine and other economic issues at home. This is consistent with claim of decades because we are looking at 1789-1815(ish) although I think the end is a blur, not line. The Consequences of actions cascade throughout the future, even to today, and just become more dilute as time passes on.
The number of years is really besides the point, which was to call out the consequences were long lasted, not just limited to the terror, and and included the wars.