At the time I thought the ending to MGS2 was both complicated(the tonal shift, it was pretty ethereal) and hilariously on the nose[edit: maybe a bit later, not exactly when the game ended].
Arsenal crashes through the financial center of the world and into wall street. Shortly thereafter a voice announces that they're the patriots and tells Raiden and Snake about the old disembodied spirits that are the secret rulers of things and they're in the walls of the white house, they have been around for a long time and they control blah blah blah, while Snake and Raiden are looking directly at the stock exchange.
Kojima is really fun and can come up with ridiculous ideas but he's not subtle, IMO people have been overthinking the end of MGS2.
The game that followed up on that, MGS4: the War Economy, Privatized Military to war ECONOMY, war is a business, corporate military, the business of war, so much money in war it drives the economy, makes it stronger than before!