Our founding fathers were very clear on what they meant with the duties of what Congress is suppose to do it is spelled out very clearly for us. There is no need to have a debate on rather what Congress should or should not be doing or what they have the power to do.
Congress should delegate various authorities if necessary, and should not be bound by what the "founding fathers" wanted. The founding fathers also protected slavery in the constitution, was that a good thing? Congress should not be bound by the past, it should be looking toward the future and not looking back.