Whilst I generally approve of the proposal because it may help to save lives I do feel there is another argument.
Being a liberal by nature I believe that the Government is there to serve us the population, not to dictate to us how we should live. I understand that from seatbelt legislation through to tobacco controls the elders in our Government believe it is their moral responsibility to tell us what is best for us, and if we don't listen then they must "do something". I seriously wander whether we should call a halt to this level of control which is already excessive and very expensive. Remember every time this type of proposal is implemented there will be a "department" of experts, regulators etc brought in to enforce the regulations. Before long they will be lobbying to extend the controls. Next in the list will be sugar.
If people chose to live an unhealthy lifestyle maybe they should be encouraged. After all dying young (50-60) with heart attacks etc will be much cheaper for the health service who will not have to keep wrecked bodies going for years with new hips, diabetes treatment etc while they still drink/smoke/overeat/take drugs/whatever. We are all educated sufficiently to understand what we should or should not do, so ultimately it is down to individual choice if you want to die young.