When religious leaders across the spectrum line up to say your policies have created a "national crisis" of hunger and poverty, when your government is forced to push out a long-delayed report that comprehensively debunks your already obviously weak explanation for the explosive growth of food banks, it really isn't a great idea to claim that your policies were driven by a "moral mission".
I hear the term "modal shift" - referring to the move of passengers from cars to public transport -- a lot, and a lot of discussion of how to achieve that. But I've now seen the answer - copy the Swiss in practically everything. And an excellent place to start would be bringing the railways back into public hands.
With the start of the university year and the surging presence of Young Green groups up and down the country, and speaking at events for the Youth Parliament and Woodcraft Folk, I've been spending a lot of time with young people. And an impressive lot they are - engaged, committed, determined. But what I've been hearing from them is how tough every aspect of life is for them and their peers, how institutions and services meant to be equipping them for life aren't delivering, and how economic pressures bear down on them from every angle.
I have found in many places traditional voters of different stripes, Labour and particularly Tory, who might not agree with every Green Party policy, but who will be voting Green on Thursday because they value their local Green Party's hard work and community knowledge, and have found their county or unitary council unresponsive, undemocratic, untransparent - and they want shed some Green light on its workings.
All too often I'm told that now's not the time to raise environmental issues. Of course it is tough for voters not sure where tomorrow's lunch money or next week's rent is coming from to think beyond those pressing personal problems, but the fact is there are many immediate environmental issues that demand our attention now.