CLEAN : Former Aussie PM Morrison denies running shadow government

The speaker addresses the necessity of having emergency powers to act in unforeseen extreme situations for the national interest. They emphasize that these powers were used responsibly during a crisis, without interfering in ministers' activities, highlighting the weight of responsibility on the Prime Minister's shoulders.

In what situations did the speaker believe it was necessary to use the emergency powers?

What does the speaker mean by stating that only they could understand the weight of responsibility?