Disney are by far and away the biggest spenders when it comes to films, goodness only knows what the Avatar budgets are and of course the Marvel stuff - it is just out of control - The animation side is no better, every Pixar and Disney animation feature costs hundreds of millions to make - but to be fair Animation is damn expensive so Dreamworks and Illumination have the same sort of budgets for their animations as well - big difference is they are a hit factory right now, compared to Disney's big miss-hits of late.
The Studio's really only have themselves to blame, they have allowed everything to grow without checks and balances, but the problem now is the costs for the SFX, actors, production etc. has been normalised so it's going to be really hard to bring down again - Virtual Production is great and brings so much to the table - but it doesn't come cheep and Disney also had the costs that come with inventing most of that stuff rather than just renting.
Bottom line is film budgets need to come down and until they do there's going to be this issue.