I do indeed remember the public "debates" between both Pearson and Diefenbaker's ministers, and between ministers and the PM ... you're right: Pierre Trudeau imposed order and it held through Mulroney, Chrétien and Harper, each of whom retained, and in some cases even tried to strengthen, the policy stranglehold that Trudeau-Pitfield imposed.
Someone else has commented that the government does not, yet, appear very well organized ... the PR team seems oddly inept, given how very, very good the campaign team was.
My recollection is that Prime Minister Harper brought in his own PR team in 2006 ~ that was the very start of his
war with the Parliamentary Press Gallery ~ and they got everyone "on message" very quickly. Additionally, Prime Minister Harper moved very quickly, only a month after taking office, to replace Alex Himelfarb with Kevin Lynch and, therefore, to get a very firm grip on policy very quickly.
Given the quality of his transition team ~ Peter Harder is something of a bureaucratic superstar ~ I have to guess that there has been some conflict between
Butts~Telford in the PMO,
Charette in PCO,
Harder in the Transition Team, and, possibly, some senior people like
Dion and
LeBlanc ...
... it is, otherwise, hard to explain what's going on at the centre.
It hints at weakness.