Why?
Because this is a DEMOCRACY! Where the views of a few tightassed representivites of congress (whom we elected!) are more important than the wishes of the constituents they represent.
And once snuck into law, no one has the gonads to change it.
Further, the law enforcement agencies have no bigger fish to fry (I realize that money laundering is a huge issure, but if this was legal we wouldn't have this going on.)
<<I think I need a beer>>
Al