You vote for the representatives and the representatives decide what they think optimizes for their value function (some mix of getting elected again, what they think is best, what they think the aggregate want, etc.). Don’t like it, elect new representatives. What other way is there to do it?
Let’s vote, the same way we do to choose representatives. Granted not everything needs to be voted but I think we could do with a bit more, rather than just trusting people that again and again show incompetence when it comes to representing and making decisions.