This is just time preference semantics though. Spend now or spend later, what difference does it really make? jtimon et al make some pretty decent arguments for their demurrage currency where holding currency is actually actively discouraged by the demurrage fee, and thus potentially reducing wasteful activities by investors trying to turn a quick profit now rather than thinking about the long-term. https://bitcointalksearch.org/topic/ann-freicoin-demurrage-crypto-currency-from-the-occupy-movement-crowdfund-89843
Unfortunately, there is little incentive for anyone to actually use a currency with demurrage when there are other, non-demurraging currencies available. And in fact I don't think a demurrage currency can ever be successful unless it exists in a vacuum, e.g. by government mandate. Anyone looking for the quick profit now will just take bitcoins or something else and refuse freicoins.
The purpose of this seems to be to spread wealth to the "laborers" by incentivizing those with money available to save into consuming more than they otherwise would. The laborers need to have access to fulfilling, goal-oriented jobs. That is the solution to that problem, not a currency noone has any incentive use that encourages people to consume and pollute.
Spend now or spend later, what difference does it really make?
People make better decisions after considering things from a number of different perspectives.