Similarly, if poorer voters are less likely to vote, parties will move to the median of the distribution of voters , not the distribution of citizens. If proportional amounts of all political persuasions don't vote, the median stays the same, and so does the electoral outcome. But if participation changes in a disproportionate way, this changes the median, and thereby changes the nature of the winning platform. There are also legal restrictions on voting. Non-citizens normally can't vote at all.
Citizens have to register in advance to vote.
Non-residents in a state can't vote in that state. Convicted felons and children can't vote. G. Similarly, you have to be a Supreme Court justice to vote in the Supreme Court, a U.S. Senator to vote in the U.S. Senate, etc. As you would expect, measures that come before these bodies are usually tailored to the median of those who vote on these measures. Like them or hate them, the key idea of franchise restrictions is to change the median voter.