Let's agree that the service should be subsidized. Let's establish that Im amenable to a free service 100% tax payer.

I am, in fact amenable to this.

How do you establish fairness though?

Best case scenario, say in the US ex-NYC, you will always have 20-40% of people needing to ride their cars because the tails of the distribution are prohibitively expensive.

Nor are these people necessarily wealthy - the economically wealthiest class of people are urban dinks.

So how to do you establish fairness to this 20-40% of people subsidizing the others?