The survey is a data point of wants. Not necessarily what one can get, but what one wants.

Example: I am due for a raise and I have meeting with my boss. I want x, y and z as well as a 40% raise. I get x and y and 25% after our negotiation. After the negotiation I can quit (in our case vote no - or I suppose some could quit) or accept the deal (vote yes).

Just the real world.