People do talk about this. At least, they do in the game industry. It's well known that when an independent studio gets bought (usually by a publisher they have been working for), this often results in the studio closing down a number of years later unless they crank out hit-after-hit. Of course, sometimes that doesn't happen and the studio gets more stability and more financial support, now that they are part of a larger company.

In regards to the people who sell their studio (founders), it's important to keep in mind that for most of these people, selling their studio while the studio is fairly popular results in life-changing wealth. Maybe selling the studio and becoming rich by doing so was not their original goal, but it should be no surprise that studio founders can be very tempted to sell the studio (at the right price). Owning an independent studio can be a gigantic amount of stress, and a huge financial reward that also allows the founder to simply get rid of all the headaches and stress is nothing to sneeze at.

Everyone who works at an independent studio knows the risks involved (to their own job eventually, if the studio is sold), and they often have mixed thoughts on what the founders are doing, but they don't all demonize the studio owners, since they would be tempted by the same potential rewards if they owned the studio.