Because it has been demonstrated in many other municipalities. I think the answer to the London example you gave us was that it happened in the seventies, when the idea of contracting out was in its infancy. As with any new idea, people made mistakes at the beginning. I'm not an expert on what happened in London, but the fact is that this was a leading-edge idea at the time. There have been many, many more successful public-private partnerships since then.
The reality is that right now if you look at Ontario, for example, with which I am more familiar, you'll see that in the Toronto area, out of ten operators of buses, eight have better safety records than the government-run GO system. So if you just look at the actual performance, forgetting the contracting-out circumstance, the actual performance of private motorcoach businesses is comparable with, if not better than, the safety records of public systems.