The headline there (from the BBC) is incendiary at a minimum.
I'm no Royalist. But the Monarch actually takes less of a percentage from the estate than they used to. 12% this year down from 25% last year. What has happened, is the crown estate is making more money due to financing green energy strategies which are both environmentally beneficial and financially sound.
The Monarch taking 12% from the estate, and the estate getting richer means there is more money going into the public domain from the estate that there has been before. This isn't "money from the gubment" being given to the monarch. This is the monarchs businesses are doing better than they have before.