It's weird. I haven't seen any other country in the world they they systematically and deliberately destroyed their biggest city. No wonder Pakistan is an economic failure. Karachi is not even part of Pakistan. It is actually the capital of Sindhudesh.
For every person from Karachi who complains on a forum, or joins a party like MQM, there are 1000 who silently pack up their bags and leave the country. Over 90% of my family have left and I hope the few remaining will leave as well.
I'll tell you a story. Over 40 years ago, during the time of Bhutto, when I a teenager living in Karachi my father told me about a friend who was a senior officer in Pakistan Navy. He resigned from the navy and was moving to America. People asked him why he wanted to move to America and live as a second-class citizen. His reply was, "I'm living as a second-class citizen in Pakistan. I would rather be a second-class citizen in a first class country, rather than a second-class citizen in a third-class country."
Nothing has changed since then. In fact, it's far, far worse for people in Karachi. They have less rights then Palestinians in Gaza or Kashmiris in Indian Kashmir.