I'd offer an answer to that question from a slightly different angle.
It's very difficult to measure the benefits of investments or expenditures such as research and development supports or credits that will encourage young people to learn non-university trades through an apprenticeship system, because there is often a strong attraction to university. Parents encourage young people to go to university. These are good paying jobs, but they have little appeal to young people.
It's difficult to measure the tangible benefits of these issues. That's why, to my knowledge, there aren't many accurate accounting ways to measure the benefits. It's also why, in many of these programs, the criteria are created by people who are elected and represented by the public. As they say in Latin, “vox populi, vox Dei ”. This is the role you play as parliamentarians. The people on this side of the table are not well positioned to play it.