What do you mean? Why isn’t it okay to create agencies that have different models of management? Like by Congress or private third parties or whatever? They can do whatever legislation allows right?
While Congress has broad authority to create and design federal agencies, the Constitution is widely considered to impose strict limits to ensure no branch "gives away" its core powers, vis a vis the Appointments Clause, due process clause and Article I vesting clause[1]
While Congress has broad authority to create and design federal agencies, the Constitution is widely considered to impose strict limits to ensure no branch "gives away" its core powers, vis a vis the Appointments Clause, due process clause and Article I vesting clause[1]
[1]https://en.wikipedia.org/wiki/Nondelegation_doctrine