This is a tricky concept.
It speaks to the notion that - if people are contributing towards their own misfortune, they should pay an additional charge to be rescued / treated and so on.
From there, it's a short step to asking obese people or smokers to pay extra to the NHS - which a large number of people see as a viable concept.
The difficulty here is the age-old issue - 'line drawing'.
Who decides who is being reckless, and who decides who and how much they would pay?
The simplest way is not to embark on that road, and simply accept that in a free and caring society, we offer help and support to the deserving majority, and as part of that, we accept that the undeserving minority are lucky enough to be included.
Since we cannot provide for the former without also providing for the latter, we simply must accept that some people don't deserve help and support, but they are going to get it anyway, because not to supply it compromises that help and support for the rest of us.