One of my thoughts is that legislatures need more money for staff. Executive branches have billions of dollars to hire experts on long term contracts. How many in house experts does a legislature have?
Maybe 100 years ago this would work, but the modern state is really complex, and the problems are really complex, because if they were easy they would be solved.
The amount of money that state and federal legislatures control is huge, My hunch is that if they spent more on extra staff, the increase in quality of legislation would provide enough economic benefits to cover the cost.