They're only incompetent from a certain perspective.
From the perspective of the bondholders, a right-wing government which seeks to privatise the NHS is doing a good job.
From the perspective of the arms industry looking to boost sales, a right-wing government which outmuscles Washington in the War on Terror 3 is doing a good job.
From the perspective of the bankers, a right-wing government which cuts corporation tax while cutting benefits is doing a good job.
From the perspective of the tax cheats, a government which announces that it will not seek to challenge the basis of domicile in an era in which non-doms in the City have fucked up the country, is doing a good job