> the entire idea of Congress delegating authority to government agencies is unconstitutional.

Authority? More like responsibility, aka implementation. I happen to believe that congress born agencies should never have been created. Anything Congress creates becomes a self-sustaining, unkillable organization, because...Congress is glacial in deciding anything.

Any government born agency (regardless of branch) has authority. Which is more efficient and reliable, Congressional Agencies or Cabinet Bureaus? The threat that a Bureau can be dissolved at any time is important to their operation.