It is not necessary dear people does get out of MQM and many people who have Job Commitment among MQM are also encouraged to do their Job first and then give time to Party later. I know that from an old timer in my Office.usually thats your line not mine.
Live with them and know their family, there whereabouts and their jobs and everything else about their life...so they cant get out even if they want to...MK got out but he cant speak, no way jose, he fear for his family.