So the reason why "train more police" counts as a solution is that, as soon as the statement and the evidence supporting the statement reaches the right person, the problem will be solved.

I think we need to get more meta that this- due to public choice theory, we can't even have 'Government Policy' as a freely-adjustable node. If Bryan's right, public opinion is the most important node, so 'Binge drinkers should change their minds' may infact be no harder to achieve.

Also, I think the women's letter could be interpreted as "Binge drinkers could behave responsibly if they wanted to. As they do not, this is not a bad enough problem for the Government to intervene.