I don't think it shows that they are biased.
Cable is admitting that they have got some things wrong, that they have made some mistakes, that they did not foresee some things. That's not biased, that's not progressive, that is humble, realistic and conscientious.
They are not biased, they are not blinkered, they are not progressive. They will change and adapt. They will not bankrupt Britain to "save the planet", they won't plan policies on the false premise that "we have only 50 days left to save the planet". They will change their strategy.
Cable says there will be new public works announced in the coming month, in a bid to breathe life into the economy.
Biased? Yes, they are biased for Britain and its people, not "the planet". As Cable says they aren't masochists, they aren't progressive. They will try their best to do what is right for the country and the people, and they are not too high and mighty, too progressive, to admit that they sometimes make mistakes.