It can help you learn more about your business: including employees who work in different roles, titles, or business units can allow you to get insight about some of the successes and woes of each area of your business. It can help you ensure that the decision you make will be the best because you will have a better understanding on how it will affect each business unit.
If you don’t currently use this style, I challenge you to try this out with a few of the decisions you need to make in the near future. I’m sure you will be surprised at the feedback you receive from employees. Additionally, it may help you make better choices.