Which government system does Golding prefer? Democracy?
Certainly on the island, Golding comes down on the side of civilised democracy as represented by Piggy, Ralph (most of the time), the glasses and the conch - instead of the hunter-gatherer anarchy of Jack and his tyrannical leadership.
However, Golding's argument is not for or against any particularly government system, but actually about the individual. Here's a quote from the man himself:
The theme (of Lord of the Flies) is an attempt to trace the defects of society back to the defects of human nature. The moral is that the shape of society must depend on the ethical nature of the individual and not on any political system however apparently logical or respectable.
The argument Golding is trying to make that it is a society full of good individuals that becomes a good society. That you can't impose goodness through rules. You have to foster it from within. And the society in which "Lord of the Flies" is located is set in a war - the plane is "shot down", and at the end, its a naval officer who rescues. The sort of behaviour in the book, Golding argues, is what a society at war breeds.