Is it possible to lead a political party and stay honest ?

Corbyn has been outspoken on things that need to be spoken. However, talking is easy to do if you don't have play a part in doing anything practical about current issues as they arise, either within a party or in government. Action usually involves compromose and sometimes least-worst solutions.

One thing Thatcher left us with (stop hissing) is a trade union movement that can play a proper role in democratic society without frightening political moderates. There seems to be an awareness in 'the centre' that the UK is too unequal, big corporations have too much power and that everything in the shops is imported.

There might be some credible left-wing options to argue for. He might be the person to show that those on the left are the good guys.