Why are Chennai Buses the way they are?

Up to now, I have been (mostly) laudatory about Chennai. But now its time for a crib session. I have been travelling by the buses of Chennai for enough time now to start criticizing them. While the buses routes are extremely well covered, and you can travel from one place to another by bus, the downside is the crowds.
The buses are ALWAYS crowded. This is distinct from any other city, where there is a rush hour, and then the pressure falls. Primarily, this seems to be because there just are not that many buses. I visited the website of the organization, which claims they have 2000 buses. 2000 buses for 7 million people in a city where the distances are huge! That is just ridiculous. Even Bangalore has more buses than that...and the routes don't take two hours to cover. Which also brings me to my next point. Buses wander all over town! The average bus seems to take the LONGEST possible route to get to the destination, taking twice as long as any other method.
And the ridiculous pricing....the prices are cheap...and so are the services. The buses themselves are in terrible condition, barring the odd exception. Truly, when you pay peanuts, you get quality even monkeys will question!
Ah well...enough of this diatribe. The main reason that it was brought on is because my knees have been beaten up sitting in a space that even a midget would have trouble fitting into!