So what if a studio lost $200 million, just write it off.
A studio doesn't just "lose" 200 million. That's 200 million spent on the salaries of all the people that made the movie: watch the credits roll after each movie to get some inkling of a clue how many. Most of those people pay taxes if they work in the US. (Don't worry, as dumb as people in the US are becoming, more and more of them won't be.)
Every time the armies of crew vehicles gas up- government gets its cut.
Whatever localities the movie shoot in sees a landslide of money come its way, including the state and local governments.
Whenever a permit is sought (and you need tons to shoot anything, let alone a 200 mil picture) govt. gets money.
Even if the picture only does $100m at the box office (a huge flop) govt. got its grubby hands on sales taxes, stinker or not.
So studio: puts up everything, does everything, pays for everything, loses big.
Government(s): puts up nothing, does nothing, pays for nothing, make out like bandits collecting a stream of tax money even off the biggest flop imaginable.
Government suck-ups (AS ALWAYS) whine, cry, and stomp their feet that their precious government (rolling in money even from a flop, let alone a huge success) doesn't have enough money *sniffle sniffle*
Meanwhile government, realizing that it's pansy ass, dumb-as-dirt suck-ups are always worried about it not having enough money, parties hardy with the fat cats that keep it rolling in dough, spends like drunken sailors, borrows a ton more money, and sends the bill to the idiot suck ups to pay.
Oh yeah, and it offers its buddies in studios and plenty of other business ventures write-offs even on flops, because unlike it's idiot suck-ups, government is able to spot a good deal when it sees one. Getting bukku bucks for a flop that's "written off" is a better deal than collecting ZILCH for a picture that's never made because the incentive wasn't there.