TTC(subway in Toronto) and question practice

I always have a hard time with asking and understanding questions, so I'd like to practice some.

The article is about TTC, transportation in Toronto.

I like the delightful TTC subway but quite a few Canadian don't like the transportation. They told me that the subway is not reliable and accurate, and the lines are too few. Certainly, considering the population and development of Toronto that 2.6million people live, just four lines looks a little inadequate. Some people might be unsatisfied.

I'm curious to know something specific: Who runs TTC, in other words, who is responsible for? What prevent from their expanding? I've heard that they have plans to expand their lines and they've never accomplished the plan. What do you think of the main problem? budget, company operating, laws, or purchase of a site for subway?

Sometimes land acquisition becomes big problem, because subway is usually constructed underneath city center where land prices are much more expensive. To avoid them, Tokyo enforced a law which the government can construct subway without paying providing the construction is carried out down to 40m below.

It's interesting to think what the problem is.

However, I think TTC is better than the people say.

but...

Even though they offer card pass, why do they provide only 2 or 3 card reader per one ticket gate?