Question

_________ were set up because congress felt it was unable to handle the complexities and technicalities required to carry out specific laws in the public interest.

Answer 1

Regulatory agencies is the answer you need. Since the congress and its members can't know everything that there is to know about making sure that the laws are being obeyed, regulatory agencies were made to ensure that people obey the laws. Such agencies do different things, from making sure hygiene is up to making sure people pay their taxes.