In Mumbai Film industry lion's share goes to the main lead actors and actresses. Nothing is spared for technicians, script-writers etc. One cannot purchase a horse at the price of a donkey.
If you look at some of the (read: most of the) commercial Bolly movies, I'm pretty sure the producer would've got a better story had they paid 10k Rupees to a struggling arts graduate/dropout than letting people like Farah Khan come up with Tees Maar Khan. There's really no excuse for bad content, it's just bad craftsmanship. There are a lot of indie movies that are made in a small budget and they are really good. All the people who do watch them, end up showering praises. The reason they don't make much money is not a result of bad taste, rather a function of a small marketing budget.
I have to disagree with
@Superdefender. The reason commercial films become huge is not because viewers have bad taste, but because commercial movie makers undertake promotion on a commercial basis. It's the same tactic used by any marketer who knows he is selling a dud product. Too many people watching a bad movie is not an indicator of their taste because every single one of the viewer is watching it for the first time and they don't know it's a bad movie before they watch it. The only source they have to base their judgement on is the marketing promos which are ironically very well made. Combine that with a strategically placed release slot (Diwali, Eid, national holiday, college fests) and you can sell a lot of tickets to wandering minds looking for some timepass. The good quality, low budget indie movies cannot match the bidding amounts for these prime slots which Bollywood giants can so their viewership ends up taking a hit. It's crony capitalism, nothing else. Neither the indie movie makers not viewers are to blame. The moviemakers who have made it big have been successful in monopolizing the market and kill all competition.
To the viewer's credit, out of all those commercially successful Bollywood movies, none of them got critical acclaim from the viewers. All of the viewers fell for the marketing hype, went to see it and came out disappointed. This disappointment isn't apparent if you simply evaluate the amount of money the movie has earned. Commercial success is not a valid indicator of critical acclaim. It just means that the producer was successful in fleecing money out of a large number of people.
Bollywood trailers are like one of those cheesy click-bait titles floating around the internet "Man tries to cuddle a kitten, what happens next will just melt your heart..."