It seems that modern cinema has gone from the cleverly crafted and directed battle scenes between individuals or small groups of underdogs, to the massive war scenes of old, that used thousands upon thousands of extras. Only now the scenes use computer chips and technological wizardry that costs millions of dollars.
People worked cheaper apparently, but when movie-makers switched to blips, circuits and fireworks, costs of movie production soared. Matrix Revolutions, the 2003 third installment in the saga of Man against Machines, was a prime example. According to Forbes Magazine, the epic sage which featured not one but two intricate battle scenes, cost $300 million to make, and $150 million to market. That must have made studio accountants tear out their hair, since the world box office receipts as of 2005, were a paltry $423 million.
Perhaps director Joel Silver had a "silver" tongue to talk studio executives into the $40 million dollars it cost to film one 14 minute actions sequence.