Most other Western nations us a parliamentary system that has worked just fine. I don't like Presidential system, until * the US was the only democracy with a Presidential system that didin't degenerate into despotism.
http://en.wikipedia.org/wiki/Parliamentary_SystemThe features of a parliamentary system
The executive branch of a parliamentary government is typically a cabinet, and headed by a prime minister who is considered the head of government, but parliamentarianism has also been practised with privy councils. The prime minister and the ministers of the cabinet typically have their background in the parliament and may remain members thereof while serving in cabinet. The leader of the leading party, or group of parties, in the parliament is often appointed as the prime minister. In many countries, the cabinet, or single members thereof, can be removed by the parliament through a vote of no confidence. In addition, the executive can often dissolve the parliament and call extraordinary elections. Under the parliamentary system the roles of head of state and head of government are more or less separated. In most parliamentary systems, the head of state is primarily a ceremonial position, often a monarch or president, retaining duties that aren't politically divisive, such as appointments of civil servants. In many parliamentary systems, the head of state may have reserve powers which are usable in a crisis. In most cases however, such powers are (either by convention or by constitutional rule) only exercised upon the advice and approval of the head of government.
Because the executive is directly related to the legislature, some argue the executive is actually more accountable than many fixed term presidential systems, as the executive, being linked to the legislative, can face an early election in the face of the aforementioned 'vote of no confidence'. In addition, because the executive is beholden to the legislature, it faces more direct questioning by opposition politicians than an executive would in a presidential system. It can also be argued that it's relatively easier to pass legislation within a parliamentary system since the executive and the legislature are always controlled by the same party and since the executive has a greater ability to "snap the whip" and force wavering party members into alignment. Within presidential systems, the executive is often chosen independently from the legislature. If the executive is of a different party from those leading the legislature, then legislative activity can grind to a halt.
Advantages of a parliamentary system
Some believe that it is easier to pass legislation within a parliamentary system. This is because the executive branch is dependent upon the direct or indirect support of the legislative branch and often includes members of the legislature. In a presidential system, the executive is often chosen independently from the legislature. If the executive and legislature in such a system include members entirely or predominantly from different political parties, then stalemate can occur. Former US President Bill Clinton often faced problems in this regard, since the Republicans controlled Congress for much of his tenure as President. That being said, presidents can also face problems from their own parties, as former US President Jimmy Carter did.
In addition to quicker legislative action, Parliamentarianism has attractive features for nations that are ethnically, racially, or ideologically divided. In a unipersonal presidential system, all executive power is concentrated in the president. In a parliamentary system, with a collegial executive, power is more divided. In the 1989 Lebanese Taif Agreement, in order to give Muslims greater political power, Lebanon moved from a semi-presidential system with a strong president to a system more structurally similar to a classical parliamentarianism. Iraq similarly disdained a presidential system out of fears that such a system would be equivalent to Shiite domination; Afghanistan's minorities refused to go along with a presidency as strong as the Pashtuns desired.
In the English Constitution, Walter Bagehot praised parliamentarianism for producing serious debates, for allowing the change in power without an election, and for allowing elections at any time. Bagehot considered the four-year election rule of the United States to be unnatural.
There is also a body of scholarship, associated with Juan Linz, Fred Riggs, Bruce Ackerman, and Robert Dahl that claims that parliamentarianism is less prone to authoritarian collapse. These scholars point out that since World War II, two-thirds of Third World countries establishing parliamentary governments successfully transitioned to democracy. By contrast, no Third World presidential system successfully transitioned to democracy without experiencing coups and other constitutional breakdowns. As Bruce Ackerman says of the thirty countries to have experimented with American checks and balances, “All of them, without exception, have succumbed to the nightmare one time or another, often repeatedly.”
A recent World Bank study found that parliamentary systems are associated with lower corruption.
http://en.wikipedia.org/wiki/Proportional_Representation