That's a difficult question because the value of some assets, say houses, depends on their desirability, their availability and peoples ability to pay for them - If you were to redistribute wealth in this way the value of these assets would change because you'd change people's ability to buy them
If it helps the Gross domestic product per person in the UK is about $30,000 US
As Ethel says you'd have to share the debt as well as the assets so it might not be such a good idea after all!