Second; what gives an immigrant, illegal or not, the right to put one foot in my country and immediately be eligible for taxpayer-funded benefits?
Your masters did. They wanted lots of cheap flesh-robots for making profits for them and then they naturally enough don't want to pay for the maintenance (thats why there are no real robots), so you lot get to do it.
They probably also appreciate that while each generation of newly-arrived precariat are fighting each other for a foothold and over race, religion and whatever, they will be way too busy hating each other to get any political ideas.
They can even turn up the heat a little by underfunding schools and hospitals; watch you dogs fighting each other from inside their gated compounds and high-rises.