"You put the dentists and the doctors and the accountants in the vocational colleges and I think that would deal with the class issue, " said Lord Glasman.
Labour peer Lord Glasman said the party "show no signs of winning the economic argument" under Mr Miliband, in an interview with the New Statesman earlier this week.
Among the other ideas championed by Lord Glasman was greater trade union representation on company boards - but he also criticised how much time unions currently spend representing bad workers.