The Liberal Party has not only deteriorated at the top; things are even worse at the lower ranks, writes Joseph Poprzeczny.Sixty-seven years after Sir Robert Menzies moved to form the Liberal Party to combat socialism and centralism, the party finds itself in a predicament.Its leaders, Malcolm Turnbull and Julie Bishop, are increasingly perceived as being well qualified for middle-rank posts in a Kevin Rudd-led Labor ministry. Nothing about either distinguishes them from most Rudd ministers. Bot…