This headline is a couple years old, but, wow:

German government plans to spend 93.6 billion euros on refugees by end 2020: Spiegel

That works out to roughly 20 to 25 billion Euros per year to deal with a problem without actually trying to *end* the problem. Thus it seems that 20 billion euro per year could be stretched into the foreseeable future.

And you know what sort of thing won’t help?

Refugees could be given right to vote in Scotland