This reminded me of the concept of demurrage in currency [1]. The idea was brought up to solve that exact problem. The messy system of inflationary fiat currencies won, and even though it is probably better and more practical, the demurrage would have had the advantage of making it clear what we're trying to achieve. Inflation seems to be hated by many people which, judging from their other political viewpoints, should be supportive of it...
[1] https://en.wikipedia.org/wiki/Demurrage_%28currency%29