Polly Toynbee and the Lib Dems

Polly Toynbee is puzzled by Simon Hughes' refusal to walk away from the coalition.  She points out the damage that the Tory led government is doing to all the things he claims to have supported over the years.  Surely, just like Sarah Teather, Simon Hughes never really supported these these apart from in rhetoric?  He and Teather have made careers for themselves by making fine sounding speeches and ignoring the practical consequences.  Why stop now?