Talking to a private news channel, he said National Accountability Bureau (NAB) was completely independent, performing its responsibilities without any political interference.
Both the Pakistan Muslim League-N and Pakistan Peoples Party were indulged in corruption and but showing reluctance to accept their corruption in the court, he said.
Ali said Opposition parties should appear in the court to plead corruption cases against them and added the court would decide that they were innocent or guilty.
He said Kashmir was the jugular vein of Pakistan and everyone should raise voice over Kashmir issue after India abolished its special status.
He said Maulana Fazlur Rehman should hold protest demonstration for people of Kashmir.
Maulana being chairman Kashmir committee had not talked about tyranny of India against oppressed Kashmiris, he added.