I have neglected to comment on major label efforts to refine their A&R process and overall development efforts.
I always take a macro, academic view on these things, and then try to infuse my consideration with the personalities at hand, although the latter is only for fun as the academic view is much more predictive.
The major labels would like to make their development costs lower--that is, they would like to lower the costs involved in taking a nobody and turning them into a somebody. They still want to be the star makers, they just don't like the idea of starting from scratch. As I've noted before, the goal is always to mitigate risk (and for some labels the short term reasons for stability are different, but the long view is the same) and this is one of the best ways to do it. The downside is that it lowers the profit margins if you pay someone else to take on the risk you don't want.
But let's step back and take a look at other key elements in play, notably company culture. Indie labels usually operate on low margins, high risk, and are successful largely due to a mom-n-pop company culture where everybody does a little bit of everything, and at the end of the day everyone's happy to be pimping little bands that they all love. Nobody's getting rich and nobody cares too much.
This isn't true at a major, where many (if not most) do not have an emotional or financial stake in the majority of the artists. Sure, you've got some A&R people who will go to bat for their acts, but at the same time the opporunistic motives for an A&R person (and also, fear of losing their job) forces them to always keep one eye open for acts that will be their next meal ticket. So beyond a few key people at a major label, the company's culture is task oriented and heavy on hierarchy. It's nothing like an indie.
The bands that move from an indie to a major typically are slightly older and hopefully wiser, and typically are going to a major for a chance at the golden ring. Or, at very least, a couple of records and tours where they can eat and sleep well. But the handling of acts changes internally when the jump is made, and the publicity mechanisms are vastly different. Most bands do not handle this aspect well.
More on this later.