[danjayh]

I am in general in favor of nearly all services being based on user fees, except in cases of people who have handicaps that prevent them from otherwise functioning normally in society (physical disability, mental health issues, developmental issues, etc.) or have had a recent extraordinary event that temporarily impacted their ability to care for themselves (loss of a job, loss of a family member, birth of a child, severe illness, etc.). In cases where it is desired to subsidize services for less well off users, raise fees on more financially capable users. To achieve this, I prefer the airline model - offer a couple of classes of marginally better service at an order of magnitude higher cost. The people who truly have the means will pay it, and those who don't will not. For instance, someone with 150k income and $15k/year medical costs,$25k/year childcare costs, and $25k/year in student debt payments might not be as well off as their income suggests. The airline model allows people with means to self-select in a way that income-based taxation does not.