No, the title does not refer to possible policy changes if Tories win the next election (after all, that would require a smaller-government agenda). Instead, it is a somewhat tongue-in-cheek reaction to a story in England's Daily Mail about couples who choose sterilization because they think children cause an unacceptable carbon footprint.
It is probably reasonable to assume that these people have a statist orientation. Since voting patterns and ideological orientation tend to be passed from one generation to the next, the electorate presumably will shift over time in a more market-friendly direction (or at least won't shift as quickly in the wrong direction).
From the article:
Had Toni Vernelli gone ahead with her pregnancy ten years ago, she would know at first hand what it is like to cradle her own baby, to have a pair of innocent eyes gazing up at her with unconditional love, to feel a little hand slipping into hers — and a voice calling her Mummy. But the very thought makes her shudder with horror. Because when Toni terminated her pregnancy, she did so in the firm belief she was helping to save the planet.
...At the age of 27 this young woman at the height of her reproductive years was sterilised to "protect the planet". Incredibly, instead of mourning the loss of a family that never was, her boyfriend (now husband) presented her with a congratulations card. ..."Every person who is born uses more food, more water, more land, more fossil fuels, more trees and produces more rubbish, more pollution, more greenhouse gases, and adds to the problem of over-population." While most parents view their children as the ultimate miracle of nature, Toni seems to see them as a sinister threat to the future.
...Toni is far from alone. When Sarah Irving, 31, was a teenager she sat down and wrote a wish-list for the future. ...Sarah dreamed of helping the environment — and as she agonised over the perils of climate change, the loss of animal species and destruction of wilderness, she came to the extraordinary decision never to have a child. "I realised then that a baby would pollute the planet — and that never having a child was the most environmentally friendly thing I could do." ...[Her husband] Mark adds: "Sarah and I live as green a life a possible. We don't have a car, cycle everywhere instead, and we never fly. We recycle, use low-energy light bulbs and eat only organic, locally produced food. In short, we do everything we can to reduce our carbon footprint. But all this would be undone if we had a child. That's why I had a vasectomy. It would be morally wrong for me to add to climate change and the destruction of Earth."