The stuffy old British may be lumbered with hereditary peers, a monarchy and an ancient non-constitution but our system is more efficient than the American one: we are not locked in a late eighteenth-century colonial time warp. You can't have strong leaders with an American-style constitution and you need strong leaders if you want to be world policeman.
State -of- the art smart bombs are useless without decisive leadership. The Americans need a prime minister based on a majority in the House of Representatives, a less powerful senate, a dignified non-executive president and some form of PR encouraging a wider range of parties.
Then they'd have stronger government based on more active voter participation.