[iguy]

Every service you buy with your savings has to be provided by people working at that time. More savings competing for fewer workers will cause inflation until your savings are reduced to match.

To take the extreme example, if everyone tried to save up and then take a sabbatical year in 2025, they would all find that their money became almost worthless -- they could buy capital goods (made before) but nothing else.

Before Paul Krugman metamorphozed into a political hack, he wrote some quite solid stuff about economics. His famous baby-sitting co-op [1] runs into this problem: Everyone wishes to earn tickets on weekdays / winter and spend them on weekends / summer, but this is impossible:

[1] http://www.pkarchive.org/theory/baby.html