I don't think the point is they have to spend their time writing more rules if they don't feel they have to, but they are the ones who would do it: with respect to the rules and policies and procedures of our government, we have a legislative branch that is supposed to draft and maintain them, an executive branch that is supposed to implement and enforce them, and a judicial branch that is supposed to interpret and adjudicate them... only, the boundary between the first and second (and arguably also the second and third) of those branches is a bit blurred as congress keeps writing vague laws that say "there shall be an agency which will prevent X" where X is something extremely high-level like "unfair business practices" and then the executive branch is forced to figure out what that means, and in the process is effectively doing the wrong jobs :/.
