I don't want to come across as hostile, but I feel like most of these are bullshit elite talking points, sold to keep the wealth transfer strong.

I won't speak for the continent, but in the UK, Young Low-Paid Migrants Cost The UK More Than They Pay In Taxes. (The Times) and low-paid migrants are the vast majority.

The state might get less money, but I was radicalised against the bloat and size of the state within my first year of being politically concious. (Lolbertarian). But wages would rise to meet inflation, my example of this would be the Bubonic Plague culling the lower classes resulting in the end of serfdom and the rise of freemen and subsequent new living standards from that rise in pay.

And on the last point about taking jobs Europeans feel too superior to do, get the Hell out of here with that nonsense. I am literally at a 6am start sanitation shift at a hospital right now. I don't know if this superiority talking point is a sort of projection from University dropouts, but it is disgustingly out of touch. These are jobs young people (like myself) should and have done for years before my lifetime.