It’s because there are some executive decisions that are better left to individuals, for accountability purposes. Once a government program is set up and funded by Congress, for instance, there’s no need to make every decision it makes into a literal Act of Congress, because there will not be any one person in charge. Congress sets the program’s mission and budget, then the Executive Branch makes sure it gets accomplished (i.e. executes it).
That assumes the head of the executive branch is not a narcissistic authoritarian that can’t abide by any rules set by others.
It’s because there are some executive decisions that are better left to individuals, for accountability purposes. Once a government program is set up and funded by Congress, for instance, there’s no need to make every decision it makes into a literal Act of Congress, because there will not be any one person in charge. Congress sets the program’s mission and budget, then the Executive Branch makes sure it gets accomplished (i.e. executes it).
That assumes the head of the executive branch is not a narcissistic authoritarian that can’t abide by any rules set by others.