That would involve a different kind of policing and higher costs which in turn involves diverting money from the welfare state or raising taxes or borrowing - and perhaps most importantly, a different kind of leadership than the usual leftist-socialist sort that has dominated France since 1968.
Agreed on all points. France really , really needs to change their preference for these socialist leaders. Hollande, for example, is a failure of a leader. Sarkozy wasn't the best, but i believe he was a better leader than this Hollande.