Different countries have different problems that they're facing right now. In the United States, the key issue is party polarization, where parties and politicians won't talk to each other, and there's all sorts of fundamental gridlocks, as we've mentioned, between the Senate, Congress, and the Presidency. Those are the sorts of issues facing the United States, and they might want to think about electoral systems, rules of the game, that might promote a more consensual system.
By contrast some other countries that have proportional representation are facing party fragmentation. They have too many parties; they can't ever get anything done; they can't get the executive to be stable; and they have a continuous changeover of prime ministers, leaders, parties, and governments. So for them, they need to think about moving more towards a majoritarian system.
It really depends on what the challenges are, and the way that I've always thought about it—I know you can't really see this—is as a matrix. In other words, you have certain challenges down the side. It might be, as the minister said, efficacy, diversity, simplicity, user-friendliness, local accountability, security, and consensus government, and you have certain types of rules, particular systems, that will strengthen or weaken each of these values. However, unfortunately not all of the, as it were, checks can be put into any one column because different systems have different values underlining them and will give you different types of consequences.