Discuss why increasing the scope of this project is not a good idea

You have now completed the charter for your office relocation project. The Project Sponsor wants to expand the scope of the project, but you are hesitant to do so per the constraints in place. One reason the sponsor is looking to expand the scope is because of a financial incentive for him. Discuss why increasing the scope of this project is not a good idea. If you must increase scope, what additional considerations (i.e., costs, timeline) must be given to accomplish this scope change?