>They've been getting more expensive by a few percent a year. It would be better if they didn't change at all but it's the best we can do. The change so far has been small and predictable. Predictable change is the next best thing after no changes.
You seem to think that predictable change is still pretty good, so why would it so problematic if change year over year was negative, but still predictable? Imagine all prices, therefore including wages, decreased on average by 0.2% from today until the year 2100 given a fixed money supply.
Where would the difficulties arise in such a scenario? If humans can plan for increasing prices, they can also do so for decreasing ones. Plus I'd argue that for prices to fall is the natural dynamic in a flourishing economy: if we're getting better and better at producing things due to improvements in social organization and technology, why would things end up costing more?
