Wikimedia always accepts donations. If the Wikimedia Foundation can't figure out a way to easily accept monetary donations from Dutch Wikimedians, why not simply focus efforts on non-monetary donations? Edits and other wiki contributions are far more valuable, in my opinion. Wikimedia Nederland seems to already be doing a lot of great work encouraging these types of contributions (e.g., Wiki Loves [X]). :-)
For the past few years I've seen it as fairly low-hanging fruit to create a tongue-in-cheek "don't donate to Wikipedia" or "donate time instead" or similar campaign. Or even register "DonateToWikipedia.org" and send visitors to the edit form of an article that needs love. When people ask me in real-life about donating to Wikipedia (nobody knows what Wikimedia is), I typically suggest making a few edits instead of donating money directly. I don't think the Wikimedia Foundation really needs the money and I think volunteer time is worth significantly more.
MZMcBride