All missing the point
That Thatcher was in power and then Major (underrated imo) and then Blair and then Brown (overrated imo) and now Cameron
- and things are still not great
... should lead one to conclude that the party leader does not really have that much power or competence and we should be expecting less from government not more.
Whether that is
more local govt / trade unions / co-ops (left)
or less govt / more self reliance / charities (right)
depends on your pov.