Mr Motion told BBC Radio 4's Today programme it was important the conference delivered some practicalproposals which would give the government food for thought.
However Anna Brychan, director of head teachers' union NAHT Cymru, warned that her members were concerned about the practical difficulties involved with the proposals, despite their "great eagerness to make maximum use of new technologies in education".
Just as in his talk with Wanniski in 1974, Mundell offered Shelton only the intellectual framework in which to craft practical policy, not specific policy proposals.
The Refugee Action group said questions remained about the proposals but it was encouraged ministers were exploring a "practical global programme to help address the world's refugee crisis".
Shadow immigration minister Chris Bryant said politicians should "tackle abuse and not just talk about it", saying his party's proposals for ending student visa loopholes and penalising firms who hire illegal workers were "practical and workable".
We invite your comments and in particular encourage you to be specific in your thoughts and proposals, providing empirical data and specific supporting examples whenever possible so this discussion can generate maximum practical value.
The consultation paper "sets out proposals to remove or reduce the language support given to non-English speaking candidates taking theory and practical driving tests".