Passage Summary: Some people think politicians changing their minds to get votes is a bad thing they have to do. But actually, it's good because it helps the government stay flexible and do what the people want.

Conclusion: Shifting policies to please different constituents is a benefit to democracy rather than an evil.

Reasoning: This behavior allows a democracy to adapt more easily to serve public interests.

Analysis: The author is defending 'unprincipled' behavior by claiming its result—adaptability—is a benefit. This argument relies on the necessary assumption that being able to adapt to serve public interests is actually a good thing, or at least that this benefit isn't outweighed by the 'evil' of being unprincipled. If we negate the idea that adaptability is a benefit, the argument falls apart. Look for an answer that connects the ability to serve public interests directly to the definition of a 'benefit' in a democratic context.