On the other hand an unprincipled man can be swayed from his chosen path fairly easily just by appealing to his vanity or self interest. Thus when one is going down the wrong path he can be diverted on to a more desirable highway.
On the third hand, an unprincipled man can be diverted from his chosen (right) path fairly easily, too, nest pas?
Actually I don't think that unprincipled politicians exist.
They all have principles. Problem lies in what these principles are: e.g. whatever serves their lust for power and control, greed for lucre, hunger for attention, etc.
So please don't say they don't have principles.
matis