I like the idea of making the stakeholder express how important a change/project is to them. I've worked on projects where my team thought we were working on mundane stuff only to find out the Sales Department would have been willing to bribe us to prioritize something that would have made their lives so much easier.... and I've worked on projects which were considered mission critical that went basically unused in production. We can throw around all the scrum terms we want but getting the stakeholder to give meaningful input to the value of a story/project is a perennially difficult problem.