Strong criticism of government policy is vital for a healthy democracy, indeed it is the bedrock. However the culture of negativity that we have at the moment is not healthy. If you criticise everything and praise nothing, what you are really doing is arguing for the status quo, and that is reactionary conservatism.
This culture of negativity being pushed by our reactionary press has exactly that purpose - to push us into the hands of the right and the Tories. Even then it is much easier to destroy the Labour vote than persuade the electorate that the Tories are worthwhile, which is why the Tories are putting their best skills of deception into action, to persuade us they have changed from being the nasty party of old. If they can destroy enough Labour votes this electoral system can give the Tories power on less than a quarter of the electorate.
Think of blogs and political campaigners, how many are running a positive campaign? If all they are doing is criticising and offering no alternative vision, be very suspicious!
Whenever I criticise something I always try to offer a clear proposal in balance. My campaigning for electoral reform is more about persuading people of the virtues of open list PR than pointing out the ridiculousness of FPTP. When I criticise the vast inequality we have, I point out the most efficient solution - a citizen's income. And when I criticise the media, I point out how well the broadcasting regulations work and how they could easily be extended to the press to stop the most overt bias.
So when I hear the sheer venon of criticism and even hatred reserved for our elected representatives and our public services, I remember that when people actually meet MPs and councillors etc and experience our public services firsthand, their opinions are very different. The media's negativity has a lot to answer for.