With the precedent of Magna Carta in mind, they drew up a "Petition of right," which hit directly at the four main grievances - arbitrary taxation, arbitrary imprisonment, billeting, and martial law; for Parliament refused to be satisfied with a general promise of good behavior upon the part of the king.
(from A History of England and the British Empire)
NEVER trust your rulers, no matter how much you may be agreed with them politically. ALWAYS assume that they will abuse their power. A skeptical people is a free people.