In other words, why can't an executor vote, in accordance with the voting intentions expressed in a will, on behalf of someone who was illegally killed?
Imagine that an election is expected to be very close. Someone kills a hundred people who were known to support party X. The killer could confess after the election and go to prison or be executed. Would punishing the killer change the results? Suppose party Y wins by 50 votes. If the killer is merely a militant supporter of party Y, but not actually encouraged or assisted by party Y, then did party Y win the election fair and square?
Imagine that an election is expected to be very close. Someone kills a hundred people who were known to support party X. The killer could confess after the election and go to prison or be executed. Would punishing the killer change the results? Suppose party Y wins by 50 votes. If the killer is merely a militant supporter of party Y, but not actually encouraged or assisted by party Y, then did party Y win the election fair and square?