Final answer:
The key advantage for defenders of the status quo in debates is the concept of presumption, which entails an inherent advantage because the burden of proof lies on those advocating for change. Additionally, incumbents benefit from the incumbency advantage, including greater name recognition and resource control. During political bargaining, a lack of agreement results in the preservation of the status quo.
Step-by-step explanation:
The main advantage that defenders of the status quo have working in their favor is the concept of presumption. This means that in the context of a debate or political bargaining, those who wish to maintain the existing state of affairs are often seen as having the upper hand because any change implies a risk or uncertainty that needs to be justified. The incumbent or those defending current policies or systems do not need to prove that the status quo is beneficial; rather, the burden of proof lies with those who advocate for change.
Furthermore, political incumbents often have advantages such as official control of resources, which can make them more familiar to voters, thereby increasing their chances of re-election. This phenomenon, known as the incumbency advantage, is also a powerful tool for defending the status quo. Finally, in situations of political bargaining, when no agreement can be reached, the status quo automatically prevails, which reinforces the inherent advantage held by its defenders.