Isn't there a pretty clear line between the following?

> I'll give you a gift card if you tell me how you're going to vote tomorrow

and:

> I want to represent you well, lets talk about what's important to you

I wouldn't propose we interfere with the latter. Or is the former truly useful for improving the quality of representation? It seems to me like it's really only good for improving ad targeting. Any representative worth their salt can find a way to get feedback from their constituency without requiring the people to participate in a cold call from a research company whose objectives are unknown.