Here's why train fares will go up again, using PTC formula for profits

[Confuseous]

The second point is equipment failure and more maintenance. More maintenance and servicing, more frequent change of equipment means more cost. You just cannot have more servicing and maintenance without having more technicians.

- http://mysingaporenews.blogspot.com/2011/12/train-breakdown-is-going-to-be-costly.html