Nigella seems to be one big screaming Daily Mail headline - full of hot air, hatred and hysteria, but no substance whatsoever.
Because no one seems to be listening. There is no money. We are horrifyingly broke to the extent that we will not be bailed out by the IMF if we go cap in hand to them. We cannot afford to continue as we are without either massive tax hikes across the board , cuts or both.
There is plenty of money. Our debt to GDP ratio is much lower than other G8 countries, including Japan, Italy, and the United States. In fact, it has been lower for most of the 20th Century:
www.economicshelp.org/blog/uk-economy/uk-national-debt/
After WWII, the UK was actually bankrupt. Yet at this time, we created the NHS and built the welfare state. Spending and investing in public services actually steadily brought down the debt ratio, and jobs were created, people became healthier and more productive, and it generally facilitated the functioning of the economy.