> It seems needlessly expensive to me to run empty buses.
But there's the counterpoint: if you increase service on a route that isn't full already, then you
1. Create more frequent, more reliable transit for people
2. Run more buses emptier than you were before
But if you don't increase service, then you have people complaining that service isn't frequent enough or reliable enough for them to use, regardless of the cost.
In my old college town, I had a job that was on the other side of the city - not a huge distance, as it was a small town, and I'd often walk home from work. Still, I looked at my public transit options one day, and found that my only two choices were to arrive at work two hours early or four hours late. No amount of fare cutting would induce me to take the bus to work. The area I was traveling to was more of an office park type of area, so 90% of commuting wanted to arrive by 8-9 PM and leave by 4-5 PM and outside of those times there was almost no demand, so it makes perfect sense, but there are always examples like that that people will base their experience off of.
(Side note: I lived in that town for several years, was a broke college student/broke minimum wage employee the entire time, and never once took the bus. In fact, I don't think I remember even seeing one.)
Cutting fares entirely will help get more people onto transit, but that also leads to political pushback as people who drive instead of taking transit complain that non-drivers are getting subsidized! Ignoring the fact that fewer cars, trucks, and taxis on the road means a better driving experience for them.