The party with the highest number of votes proposes laws, they have to pass both houses to become law, every vote is a conscious vote. We could put thresholds too if we want so that a simple majority isn't enough.
The economy is already broken into sectors such as agriculture, technology, tourism etc. We could simply formalise these sectors and the N unions with the highest membership in each sector selects an advisor for the panel. The idea each sector can be broken down even further. For example if technology is a sector they can break it down into hardware and software or whatever.
Any law that is proposed would be submitted to the advisory panel where the experts would write a report listing the possible benefits and the harms of the law. They don't get a vote.