Sorry Ed but Panther has it right, you're comparison with "Modern F1" to previous decades is way off.
Jackie Stewart, Jim Clark, Jack Brabham, the immortal Juan Manuel Fangio, Emerson Fittipaldi, Denny Hulme, and of course, Nikki Lauda won without 'Team Orders'.
While one could say that Mike Hawthorn, Jody Scheckter and even Mario Andretti had assistance from their team mates it was always a 'Gentleman's Agreement' and not team orders.
Villeneuve could have won in 1979 but he believed that he was the #2 and had plenty time in the future for his chance, sadly he ran out of time. Hawthorn won in 1958 because Phil Hill regarded him as the senior driver and as Mike was ahead on points he let him through.
Andretti stepped into Team Lotus with a dog of a car, a car he developed to become the first dominant ground effects F1 car.
Ronnie Peterson signed on in time to enjoy the benefits of Mario's work on the clear understanding that he was #2, and he would become #1 for the following year, again, sadly another Gentleman Driver who died before that came about.
Alain Prost was always the leading McLaren driver until Senna came on board, things came to a head at Suzuka in 1989 and from then on Senna insisted that he was teamed with drivers who were #2 and #2 only!
And of course, after Schumacher found himself being out driven on several occasions by Martin Brundle in 1992 he insisted on journeymen team mates only.
Nigel Bloody Mansell would (probably) never have won a title if it had not been for Frank Williams backing him against Ricardo Patrese.
I could go on but I think you get the picture.
As for today,
I still say if I own a team and finance it then I decide (after a certain time) who becomes the driver that is team leader and who is back up.
I maintain my stance on radio 'coaching' as well, it is OK from a safety point of view and necessary on ovals but even those good old boys in NASCAR rely too much on having their hands held.