Bad luck? Jeter's flip, Nixon's HR, Koch's meltdown.
Beane assembled some of the best rosters in the 90's, all under $40 million dollars. Remember, this is when no other low payroll team even approached .500. Just because, you think that Moneyball is "pussyball" doesn't mean you should be blind to that fact that Beane managed to vault the A's from one of the worst franchises in the mid-90's to a perrenial World Series contender. (In a year)
Give Beane $100 million dollars, he'd win a World Series or two.