On the topic of residuals and the intentions of studios ("Their intention is to keep money on the table of all those creative people. To keep paying residuals to actors who might not find work for years at a time."):
First, in 2007 the CEO of Warner Bros., among others, called for an end to residuals . Second, studios are notorious for creative accounting which results in people with residuals on "net" profit being paid nothing; for instance, one of the Harry Potter movies grossed $938 million worldwide but "lost" $167 million ,  The latter link cites a court saying the way Hollywood determines pay for authors was "unconscionable" (I wish its citation was to a source that's online). And third, I don't have a reference at hand for this one because I heard this on NPR years ago, but there was a trial where a studio accountant was questioned about the accuracy of movie profit statements, and he said that in his entire career he'd never seen a single movie where the accounting was accurate.