WHAT HAPPENS WHEN YOU ARE PROMOTED

No company gives you a higher order job, higher title and higher pay without having a higher expectation of output from you. 

You don't go higher with the ask being the same. 

As you get to senior levels, two things change. 

First, the complexity of the problems/issues you deal with and second, the number/quantity/breadth of the issues.

At senior levels, the number of people who want your time is far greater than the time you have, the number of things that need your attention is far greater than the number you have handled earlier and the number of simultaneous things you have to manage is far greater than what you have ever done.

The breadth is such that one day in the morning you could be discussing the long term strategic plan and in the afternoon same day, you might have to deal with next week's issues.

The long and short of this is as you climb high you have to drive an exponential increase in your productivity as well.