Since 1965 2 championships in 50 years. As someone said recently the Dodgers are a baseball organization, the Giants are a baseball team.
Sure, the Dodgers have a big payroll, but they ended up overpaying for too many players and the clubhouse chemistry is not that great. And it doesn’t help the Dodgers that their TV deal shuts them out of 70% of the population of Los Angeles viewing audience; in sharp contrast, both the New York Yankees and New York Mets have their games seen by most everyone in the New York City area (just about all cable systems in New York City and NYC-area DirecTV/Dish Network subscribers can see the YES Network and SportsNet NY).