That and those annoying people usually refered to as the opposition.if you could have the same person ruling the country as a president or a king, he'd always do a better job as a king than a president, because his actions wouldn't be limited by the need to spend the first four years sucking up to the people to get re-elected
Altough there is one thing i find odd about that military organisation of the commonwealth: Even though the parliamentarians won the civil war in the 1600's and maintained power ever since then, why does the military pledge allegiance to the crown?