Bojo There is a very large multinational HQ in Brussels that is driven by something other than money, and is not the EU. It is not a company in the private sector. Ds will be working either in the archives or the multi media library, which as he wants to do an MA in Public History, gives him some experience, adds to his experience of living abroad, will hopefully refresh his Flemish and French, and get him a security clearance, which is always useful to have. It's a couple of months in the summer. It's not money driven, given the pay. It's also unusual to get a student job in Belgium as there are very restrictive rules on student jobs here, but they don't apply to this organisation. It will look good on the CV, which is more to the point.
He may not get an internship post MA, but it is worth applying, and his housing costs will be stripped out as we are still here if he does, so he can live at home. I don't think €800 per month is huge for an internship, given the cost of living in Brussels.
I hope he doesn't teach, unless it's A level and above, but that he gets a job with the National Trust, English Heritage, the National Archives, the Mary Rose Trust or a good museum etc, none of which will pay hugely, but will interest him.
I think between us, his Dad and I can show him how to map his skills against the essential and desirable experience and qualifications on an application with examples. His Dad does it for those he mentors, so is used to it.