The claim is that poor people have a human right to beg. I’m skeptical but suppose it’s true. Brussels has professional beggars. Beggars who are not poor cannot use the human rights defense.
As for genuinely poor beggars, they should be getting social aid. The aid should account for level of need, number of dependents in the family, etc. Begging abuses that balance and disproportionately rewards those who create a public eyesore. Donors who go through a charity have some confidence that there is an even distribution and a vetting process to weed out the non-poor beggars. Doesn’t the social system satisfy the human rights of the poor? If not, why not?