These open-borders politicians don't understand the INTENDED role of government. The purpose of government is to handle the collective business of The People; not to RULE the people.
Government is there to build roads (so each citizen doesn't have to build his own roads); to provide law enforcement services (so each person doesn't have to go out and enforce the law himself); etc.
Therefore, the purpose is for the politicians to manage The People's resources for The People's services and benefit; NOT to use The People's resources to pay for OTHER PEOPLE'S NEEDS - UNLESS THE PEOPLE ASK THEM TO DO SO. I haven't heard The People beg the government to squander OUR finances on foreign invaders.