"All the money will go into his microcredit charity, which offers small loans to Latin America and builds development aid strategies to self-employed people in El Salvador, Honduras, Bolivia, Peru, Argentina and Chile."

The sad irony is that microcredit/microfinance works best when it's not a charity - further there are numerous examples of microcredits that do operate as charities and who end up squandering money on inefficient operations than reaching the poor because of how their performance is measured.

As you point out, the idea that wealth comes from taking from the poor is not only wrong, but often harmful to the very people those like this donor claims he wants to help.