Head of the IMF

It would seem that Osborne is supporting the candidature of French Finance Minister, Christine Lagarde, to become the new head of he IMF.
I think it is time that the Government started to give reasons for such decisions. Why the support for a Left Wing French candidate? Why another French politician? Don't we have a suitable candidate (and I'm not thinking of Gordon Brown)? Surely for impartial decisions on whether the IMF should support an EU country, it would be sensible to have someone from outside the EU.
I note from the BBC that in a joint statement, Australia and South Africa have asked that the new head be appointed on merit, not nationality, something with which I fully agree. If you add that to the fact that left wing politicians have been responsible, at least in part, for the financial crisis, I find it inconceivable that Osborne should be supporting yet another left-winger.
I think the Government has a duty to explain its reasoning to the British electorate.