Apple's UI and integration innovations not nearly in the same class as those of the others. That's not to say Apple doesn't help society, or that it's not creative. But it's certainly not doing the same type of work as the others. In fact, many of the technologies that Apple has purchased, such as Siri, would not exist without lots of funding into solving the harder problems.
That doesn't mean they wouldn't like to take all the credit for it ;)
The transistor was invented in one of those large R&D units, Bell Labs from AT&T, maybe it did not brought money as the Mac or the iPhone but it was real innovation, you could always argue that it was all about people but I think without AT&T money it would have appeared much later in history.
EDIT: deleted some unnecessary words.