In the T20 format, it is not only necessary to maintain the wicket but also to maintain the wicket and increase the batting score.  Even then  there was no problem with the Pakistani batsmen losing wickets towards the last, unless they could score 180 or 190 runs. Well, anyway, now it's a matter of seeing how Pakistan are going to perform. If they can take three-four wickets in the power play, I think they have a chance to win.
Pakistan have taken 3 wikcets in first 3 overs. Muhammad Hasnain has got 2 wikcets in his first over while Nawaz got a wikcet in his first over. England batsmen are not showing responsibility, its not a big score but they have given away 3 wickets in first 3 over.