The Local Government Association (LGA) says that it cannot afford to continue the concessionary fares schemes because they are so expensive, but they are enshrined in law. These passes allow the elderly and disabled to escape the four wall prisons they cal "home". Without them they would otherwise be confined: day-in, day-out.
In towns and cities they might not be so necessary and a nominal charge of say, 10p or 20p, could be made per journey, but in rural areas such as the Dales or Lake District they are an absolute necessity to get to market for food/clothes/Post Office/banking.
It's typical of the London classes, where everything is within walking distance, to come up with reducing funds for such schemes.