 In certain circumstances, a volume purchaser may be able to guarantee sufficient volume to reduce overall prices while providing greater profitability to the seller, such as in so-called "purchase commitment" programs.Economist Arnold Kling attributes the present cost crisis mainly to the practice of what he calls "premium medicine", which overuses expensive forms of technology that is of marginal or no proven benefit.Milton Friedman has argued that government has weak incentives to reduce costs because "nobody spends somebody else’s money as wisely or as frugally as he spends his own".