I understand your criticism but What could Imran Khan do? PTI does not have a single person in the party who has financial expertise. There are many who have expertise in throwing dirt at the opposition. their tongues are like sharp knives but no brain. He trusted Asad Umer but we all know how disappointing he has been for the party and for the country in financial matters. Imran Khan had to remove him. Then Imran Khan was going to bring Mian Atif to Pakistan but later he was told that, though Mian Atif is an expert in economic matters, he believes in one extra prophet so he can not be accepted.
Then Imran Khan started trying Peoples Party's previous finance ministers. (whose economic policies he vehemently criticized when he was in the opposition). So he has to run the country and PTI does not have an expert in finance. The only problem is, Shaukat Tareen is working for his ex-boss i.e. Zardari, not for his current boss i.e. Imran Khan.