If you're accomplishing cohesive, important goals with your sprint, why do you care about thumb twiddling or some refactoring? If those doing the thumb twiddli

If you're accomplishing cohesive, important goals with your sprint, why do you care about thumb twiddling or some refactoring? If those doing the thumb twiddling are important team members who are tangential to this sprint, why not offer them a bonus vacation or something else morale boosting that doesn't require their butt to be in a seat when it's not necessary? If they're not really helping you accomplish any important goals, why are they on your team? All that said, it sounds like you've already struck a pretty good balance between accomplishing big goals and taking care of small but necessary stuff.