Well, she clearly doesn't care where the money comes from (meaning, whether the tax paying people are atheist, catholic, protestant, muslim, buddhist,...) as long as she gets it.
So, she shouldn't be so strict in deciding where it goes to.
If she wants to spend her own family money that way. Fine.
If somebody who gathered her/his fortune himself through work does that. Fine.
Belgian tax money? No.
And I am
It's a good thing that the next generation of royals will mostly have to work for their money (the children of Laurent, Astrid and most of the children of Filip except Elizabeth)