I think I'm missing something, because even US territory born still possess full-blown citizenship. They can't "vote" but are 100% subject to all the US taxes. It wouldn't make sense if one isn't corporated into the system, as the island was forced to bend the knee. I do, however, think it weird if I work at McDonald's I'll have to pay social Security and medicare (which is stupid). If one lives in the US are they paying for more than those two items?