The weird thing is that a country did try the open boarders give foriginors special treatment at the expense of locals thing. It happened under the direction of a man named Porfirio Díaz in mexico.
It didn't end well....
You have 3 main fractions fighting for power with goals that are not compatable on top of many smaller fractions with incompatable goals.
Its not that they cant think far ahead its that its not possible with the current party make up.