Sorry NanKate, didn't see this question at the time.
It is because of that 'slippery slope' - it is very important that anyone requesting help is 100% compos mentis and able to make their own decision, and totally clear about what it means.
Many in the groups that fight for legalisation would like dementia/Alzheimer's to be included, but this will take quite some time- and at this stage, best left out, however wrongly- to appease the 'slippery slope' accusers.
You have my utmost respect for doing what you knew your mum wanted. Such a hard thing to do, even though you know that is what they want. And it should not be this way. One should be able to make a very clear advanced directives, with one's wishes in case of dementia/Alzheimers, and at what stage, with 3 main criterias to be chosen. At the moment, if anyone is struck with the disease, even if members of an Association and with advanced directives in place, all they can ask for is DNR and do not force feed, no anti-biotics, etc. Or to make a decision at an early stage, far too early, to ensure that they don't go past the point of no return. It takes guts to do that- but at least in some countries, you can get assistance at that stage.
I think Belgium is the only exception, where an advanced directive can be used in such cases- but I am not sure if you have to be officially resident in Netherlands at the time- must make enquiries to that effect.
Posting today to remind people who would like to understand the issues better, to watch the documentary tonight with Prue Leith and her son. She in favour and he against. Should be very interesting to say the least.