OK, my two pence....
...this will always happen in any country where welfare is too freely available. This is because the poorer cultures generally breed a lot quicker than the more affluent.
It wouldn't have happened 200 years a go because if you bred and couldn't feed your kids, they died...now adays...well, you get given a 6 bedroom house and more money than most workers get.
This goes for any culture that breeds a lot.
We fought back many cultures over the years as their overbreeding was capped by resources...now we are paying for all that it isn't a cap any more.
SO we'll see more uneducated people, more ******, more catholics, more muslims...just the way it is,...
..and when the welfare system collapses...THEN we will be put back 100 years.