Should a batsman play only 60 balls in a T20 match with an option to come back?

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Nowadays T20 Cricket is being popular and I felt that if a batsman in a T20 given some chance he might waste the balls so I rightly felt that in a T20 game having only 120 balls and a batsman facing 60 balls and above is absolutely waste so I thought of an Idea that if a batsman has faced 60 balls and if only 5 wickets are lost he could be called as Condition retire and giving him another chance after two wickets is lost.Do you think it is a good Idea what is your opinion.