J. K. Rowling acknowledges the support structure

That saved her when she was a desperately poor single mother. And she'll never vote Tory even though she's now one of the richest people in Britain:

But wait, some will say. Given that you have long since left single parenthood for marriage and a nuclear family; given that you are now so far from a life dependent on benefits that Private Eye habitually refers to you as Rowlinginnit, why do you care? Surely, nowadays, you are a natural Tory voter?

No, I’m afraid not. The 2010 election campaign, more than any other, has underscored the continuing gulf between Tory values and my own. It is not only that the renewed marginalisation of the single, the divorced and the widowed brings back very bad memories. There has also been the revelation, after ten years of prevarication on the subject, that Lord Ashcroft, deputy chairman of the Conservatives, is non-domiciled for tax purposes.

Now, I never, ever, expected to find myself in a position where I could understand, from personal experience, the choices and temptations open to a man as rich as Lord Ashcroft. The fact remains that the first time I ever met my recently retired accountant, he put it to me point-blank: would I organise my money around my life, or my life around my money? If the latter, it was time to relocate to Ireland, Monaco, or possibly Belize.

I chose to remain a domiciled taxpayer for a couple of reasons. The main one was that I wanted my children to grow up where I grew up, to have proper roots in a culture as old and magnificent as Britain’s; to be citizens, with everything that implies, of a real country, not free-floating ex-pats, living in the limbo of some tax haven and associating only with the children of similarly greedy tax exiles.

A second reason, however, was that I am indebted to the British welfare state; the very one that Mr Cameron would like to replace with charity handouts. When my life hit rock bottom, that safety net, threadbare though it had become under John Major’s Government, was there to break the fall. I cannot help feeling, therefore, that it would have been contemptible to scarper for the West Indies at the first sniff of a seven-figure royalty cheque. This, if you like, is my notion of patriotism. On the available evidence, I suspect that it is Lord Ashcroft’s idea of being a mug.

Child poverty remains a shameful problem in this country, but it will never be solved by throwing millions of pounds of tax breaks at couples who have no children at all. David Cameron tells us that the Conservatives have changed, that they are no longer the “nasty party”, that he wants the UK to be “one of the most family-friendly nations in Europe”, but I, for one, am not buying it. He has repackaged a policy that made desperate lives worse when his party was last in power, and is trying to sell it as something new. I’ve never voted Tory before ... and they keep on reminding me why.