What if I move during an election year, before the election? The IRS wouldn't have my new address. If I don't update my driver's license, the DMV wouldn't have

What if I move during an election year, before the election? The IRS wouldn't have my new address. If I don't update my driver's license, the DMV wouldn't have my new address either. If I move in with roommates and I pay my roommate for utilities, the utility company wouldn't know my new address either. Just a few reasons why it is a hard problem.