It is very depressing indeed that Britain was managed 1997-2010 by men of low calibre and principle such as Tony Blair and Gordon Brown. Peter Mandelson is cut from similar cloth.
There is an old saying in politics: shit floats to the top. The only means of part remedying the problem is to have greater openness in government and more accountability by parliament. It is absurd to have the reform of government departments, for instance, brought about or stymied to avoid the tantrums of ministers.