The idea for the controversial law was first discussed last November by French President Nicolas Sarkozy. It also mirrors the primary goal stated in the annual report on digital music by international music trade organization IFPI.
The suggestion that ordering ISPs to prop up the current (failed) music industry model would promote such changes is dubious at best. In fact without ISPs policing their networks for copyright violations, with the recent announcement from Sony BMG, every major label has already officially given up on DRM. This marks a major shift in strategy that makes most music downloads nearly universally compatible with portable media players from iPods to Zunes to Zens.
Ironically the reported "cost" to the labels for ISP cooperation is to make their DRM interoperable. In other words it's about a year and a half behind the advances labels have already made due to consumer pressure.
It also doesn't seem to make sense for the labels to disconnect people showing an interest in downloading music, rather than figure out a way to develop a revenue stream around them. With online music becoming nearly as common place as radio it's time to figure out where the revenue streams are rather than concentrating on efforts that don't make money (like disconnecting music lovers from the internet).