You are also an atypical worker. Less-skilled labor faces a much greater potential threat from uncontrolled immigration than you do. Also, many potential immigrants might decide to live in the US based on mistaken, outdated perceptions of opportunity and social mobility, but later wouldn't have the financial resources to relocate again if reality didn't meet expectations.
Emergency medical care is provided freely, and has its costs, as well as public education. Also you can't discount the risk of turf wars and violence with the "native" population, especially during times of economic stress or other instability.
Don't get me wrong; i'm all for immigration streamlining and reform, as well as equal legal protections for all people regardless of citizenship status. But immigration control remains a complex, multifaceted issue, that does not necessarily lend itself well to fully idealistic, ideologically pure solutions. Even the most liberal (or libertarian) of European countries have border control and non-trivial, exclusive requirements for immigration, with many policies and requirements being even more restrictive and byzantine than those of the US.
Emergency medical care is provided freely, and has its costs, as well as public education. Also you can't discount the risk of turf wars and violence with the "native" population, especially during times of economic stress or other instability.
Don't get me wrong; i'm all for immigration streamlining and reform, as well as equal legal protections for all people regardless of citizenship status. But immigration control remains a complex, multifaceted issue, that does not necessarily lend itself well to fully idealistic, ideologically pure solutions. Even the most liberal (or libertarian) of European countries have border control and non-trivial, exclusive requirements for immigration, with many policies and requirements being even more restrictive and byzantine than those of the US.