Some really good art was made entirely for the money.
Like the original novel A Clockwork Orange was admitted by the author to have been made solely for a paycheque.
L. Frank Baum made Wizard of Oz sequels entirely because his adult books didn't sell, he was essentially shackled into making Oz books to feed himself.
Hell one of Marlon Brando's most famous roles was in Apocalypse now. He demanded 3.5 million for it, didn't memorize his lines, showed up severely overweight, and caused Coppola to film him in very creative ways to avoid him coming across like he really didn't give a fuck about the film. And it worked because he comes across like a mysterious Satan-like character as a result when he was originally written as a charismatic character.
Sometimes doing art solely for the money is a good thing. Like Sean Connery agreed to perform in the final James Bond film he was in, Diamonds are Forever. For 1.2 million Euros solely to found a Scottish performing arts funding company, that went on to fund future art pieces.
One of the most famous instances of an artist doing something purely for money was Sir Alec Guinness with Star Wars. He only agreed to play Obi Wan purely for the money, and he had a very negative opinion of the film. Later on after the trilogy was finished he regretted doing Star Wars since it overshadowed his other films, and vocally said he didn't respect it.
Ray Liotta admitted that he only voiced Tommy Vercetti in Grand Theft Auto Vice City purely for money. And that he never saw any footage or played the game in his life. And when he was asked if he could do the role again knowing it was going to sell extremely well what he'd do differently, he responded with "ask for more money".
Ron Perlman was asked in a Reddit AMA if he has ever played any of the Fallout games. Since he plays the narrator in them. And he responded saying he never has and that he doesn't play video games.
Orson Welles's last film role was as Unicron in the Transformers movie. He later said the only thing he knew about the film was that it was about "Toys killing each other".
"People ask me why I'm playing in this picture. The answer is simple: Money, dear boy." - Lawrence Olivier
When promoting
Ender's Game on
The Tonight Show,
Jay Leno
asked Ford about his involvement with
The Expendables 3. Ford says, "They asked me if I wanted to be in the movie, they gave me a reason that I should be..."
*Leno rubs his thumbs and fingers together, signifying "money", Ford nods.* "That's a good enough reason."