As people said you don't want to completely stop savings but it would make sense for social benefits. Take snap. You could limit people to not keeping in excess of one months benefits in savings (the reason you might allow a month is so that they can do something special on a holiday or birhtday or such). So 2x times their benefit would be the maximum allowed holding. Now lets say you limit snap to things grown and processed in the US. Now it acts as an economic stimulus as well as a social safety net and you prevent the hoarding thing. You could convert all argricutural type aid to it and it would likely be better for the industry. Now note you stopped hoarding of the currency but that does not stop hoarding. Some folks if they see they have not used the full benefit will buy some treats like ice cream cake or something. Others however will buy canned goods or rice and beans and hoard that. Granted those folke like hoarded anyway. Similarly if money in general had an expiration date then rich people would buy more single family homes and warehoused and precious metals and such.