I somewhat misunderstood you earlier.  As you say, a pure simple PoS that inflates in the way you describe is in fact pointless, as it doesn't really perform any redistribution.  The bond example I gave earlier is a form of redistribution from short-term holders to long-term holders.  Its probably a good mechanism to have, but its not sufficient by itself as a redistribution strategy.  You actually want the new coins to go to those who work for them in some fashion.  PoW does that - albeit the work is pointless busywork.

Of course it would be better if the work done in exchange for new coins actually increased the long-term value of the coins: an idea I argue for at length elsewhere.