Regarding the current Supreme Court, TX Bill, you are being somewhat misleading in your arguments about liberal imbalance.
Of the current sitting justices, 7 out of 9 were appointed by Republican presidents. In fact, before the two that were appointed by Clinton, the previous Democratic appointment came in the 1960s - a full 40 years ago. (In fact, since Clinton and LBJ were both "good ole boy" southern Democrats, one could argue that there has been no candidate proposed by a "liberal" Democrat in my lifetime. Although you would no doubt correctly say that there have been justices who have been unappealing to the religious right, which is another matter entirely.)
The point about your constitution is that it has checks and balances between the legislative, the executive and the judiciary. As you rightly pointed out, your country's founders chose an electoral college to help bypass the effects of a simple majority (and, so I understand, because of transportation problems in those days).
It also provided for a system of nomination and approval for the justices and, if it came to the point where the electorate were so utterly unimpressed with one party that they gave control of both the executive and the legislative to the other party, then one must presume that that is what the founding fathers intended.
And arguing that those Supreme Court justices don't reflect the will of the people at any single point seems slightly contradictory when you are perfectly happy to accept an electoral system which deliberately does the same, just because it is written in the same constitution.