Though yes, there are a decent number of them who make a decent bit:
http://en.wikipedia.org/wiki/Screenwriter's_salary
But to put it in perspective: M. Night Shyamalan was paid 2.5 million for the script to one of the most successful movies of the 90s. It made... 672 million dollars. He made less than 1/200th (given that the budget was about 60 million) of the profit for the movie, for fucking writing it. He probably made a bit more for directing it - but this money mostly ends up in corporate pockets. And according to wikipedia (yes, i know, wikipedia) that was amongst the 40 or so highest amounts paid for a script. There have been thousands and thousands of scripts made and produced that didn't make close to that much.
Like I said, though, the issue of too much money being funneled into hollywood is a different one, with different grounds to fight on. If you want to fight that battle, do, but if you're willing to support hollywood by watching its movies and shows, than don't complain when the people who actually make the shows want a fair share of that money.







