The few who would kill public transport are ignorant of history and the world. There isn't a single "private" (what does that mean, today?) and profitable transport system on Earth, yet the need for them is undeniable. If 'only' 12% of our local population uses the bus system, should those 12% just be told to f*-off and stay at home: no jobs, no school, no going to stores? So Joe-Blow can save an imaginary few bucks a year on his tax bill? Really?
The "free market cannot be bad" fantasy is really pathetic, btw. Markets are made of people, who are very prone to being wrong.