The way I see it, the answer is yes. It is easier to deal with expenditures, for example, when you have a system that is better compartmentalized. When there are two parallel regimes, you will always have people who push the envelope for both of these regimes and try to take advantage of one or the other. In my opinion, that is the drawback of having two different regimes for the same question, for the same event.
On November 17th, 2009. See this statement in context.