Re: Fair enough, but as a matter of balance
"I am told by my niece, presumably reliably, that at her boys' school, some pupils effectively have full time teachers to teach in their own foreign language whilst the other 34 pupils have to manage with the one teacher."
No offence to your niece, but no, she's not reliable.
I hear an AWFUL lot of bad stuff about refugees in the Netherlands. Ignoring all the obvious lies and exaggerations, several people I know who are otherwise quite decent (if a bit up themselves) who did a bit of volunteering for refugees (back when it was cool) who had oodles of stories, about how they get given thousands of euros, that they won't get a job, all these things that where essentially repeats of "they get stuff that locals don't, and are depriving us/our kids of it".
We're friends with a couple of Sryian families in our neighborhood, and since my wife works for the tax department, she helps them with filing their returns. So she actually has quite a good idea of what the various benefits they gain.
Firstly, refugees are not allowed to work. Which means they are totally reliant on the state, and risk getting kicked out if they violate that.
Secondly, they have to do a path to work course (where they learn Dutch among other things). This is both compulsory and costs ~2 grand. There are companies who loan them the money for this, at fairly sharp rates.
Thirdly, the amount of support is quite variable. One family of five (kids aged 5-10) gets about 60 euro a week to live off, after rent+power is covered. Another family of four gets quite a bit more (150 pw after bills) because they've been relocated from a neighboring town, so get an allowance to cover travel back to see their other family members.
Lastly, a lot of the grants have a lot of conditions attached to them. So much so, that sometimes it's not worth doing it. "Free" swimming lessons took nearly two hours to do the forms for, by a native speaker. I thought I'd had enough of Dutch bureaucracy, turns out I should be glad I'm not entering the country seeking assistance.
While the kids don't get any extra teaching resources allocated to them (because they don't need them) their school does get paid extra for taking them.
I'd be VERY careful with any stuff you hear, since refugees are highly politicized subject. Even though they shouldn't, seeing as they've been through the bureaucratic wringer.
I also got to see one of their "temporary" camps where they get kept until they can be placed in normal housing. Other than the fact the gates are open during the day, it's a concentration camp. In the woods, 5km from any town, with some trees screening it. It's bloody unsettling to say the least, but I'm one of those bleeding heart liberals who think that we should be using our positions of privilege and power to help those who've been screwed over.