Who should pay for emergency treatment?

http://www.telegraph.co.uk/news/uknews/5368034/Drunks-should-pay-for-emergency-treatment-think-tank-says.html

As this article in the Telegraph highlights, there is an ongoing debate about who should be paying for emergency treatment?  If you end up in A&E after drinking heavily should the person or the NHS pick up the tab?...and how can we actually work out who ended up in hospital due to their own actions versus the actions of others?...who is responsible?  The article goes on to consider if a alcohol price rise will have an impact on the number of A&E admissions we are seeing, what do you think?