Scott Adams pointed out that the physical location of your mother at birth is
a weird way of determining citizenship. I would add that having eligibility to vote be a simple yes/no proposition, with all votes weighted equally, is also a weird way of determining how much a vote is worth. Those who are not eligible to vote still have interests in the functioning of government, but those interests are not represented. There are also those who are eligible to vote, for example, a voter would acquired citizenship at birth, but has resided overseas in the custody of a non-U.S. citizen parent every since, has no connection at all to the U.S., but whose interests are still represented.
The current system has the virtue of simplicity, but I believe its inequities override its virtue. I propose that a new system be created, in which ones voting rights are linked to the strength of one's ties to the United States. The more your prosperity, your future, is linked to the prosperity and future of the United States, the more your vote would be worth.
For example:
You'd receive 50 votes for birth in the United States.
For every immediate relative you have in the United States, you'd receive additional votes (say 5 to 10 apiece). (This sounds complicated, but we already do relative preferences for immigrants, so it's possible to do it for citizens as well.)
For every year you reside in the United States, you'd receive an additional vote. This takes into account the difficulty of restarting a career (also,
I'd have the parents cast the children's votes).
You'd receive additional votes, but on a declining basis, for fixed investment in the United States. (This takes into account the political power that accrues to the wealthy.)
You'd receive additional votes for service in the military, which (obviously) makes you a less attractive prospect for resettlement in other countries.
And so on.
The end result is that a middle-aged, property-owning, veteran whose family is entirely in the United States, would have far higher representation than a 20-something student studying abroad.