Sometime prior to divestiture, the 1% may have been raised a little. There may have also been additional operating company funding for Bell Information Systems, which developed administrative software for their use.
The notion that Bell Labs was an idyllic competition-free environment is incorrect. In the development organizations there was fierce competition between developers of analog versus digital transmission systems, microwave versus coaxial cable systems, space division versus time-division switching, etc. There may have been less in the basic research, but having worked later with ex-research staff, I'm pretty sure there was considerable competition for resources, funding, and scientific credit and internal/external recognition.