Pop was initially ignored as a moneymaker by the recording industry. In the seventies they were still relying on Frank Sinatra and Tony Bennett for their big hits. You know, most of the budget for the record companies in those days went to the classical department - and those were big budget albums.
Tony ViscontiTowards the end of the seventies pop was gaining the momentum and respectability was very high with groups like Yes and Queen who were making "classical" rock records. They were also bringing in big bucks. So the eighties became the "bottom line" decade.
Tony Visconti