He urged the Chief Justice of Pakistan Iftikhar Muhammad Chaudhary to take suo moto action, as the matter was of public importance.
In a statement here, he said the mandate of the caretaker government was to assist the Election Commission of Pakistan to hold fair, free and transparent elections and facilitate the democratic transition and run the day-to-day affairs of the state.
The caretaker government is barred from taking such decisions as tax proposals when the new elected government is about to assume responsibilities within days, he added.
He also urged the caretaker government to withdraw the tax proposals and let the new government take the decision in this regard.
The sales tax, he stated, could be levied with consultation of the provincial governments and the Council of Common interest was the right forum on the subject.