Even the wealthy can't escape their craving for attention, and charity is their most "cost-effective" tool. After all, a donation leads to endless media exposure, and their public image skyrockets. On the other hand, it is precisely because of these celebrity stunts that the public’s focus is drawn to distant social issues.
"Cost effective"? I don't think that donating money should be considered the most "cost effective" way for someone to gather attention.
Nowadays everyone can become famous by just saying or doing something stupid on social media. This is way more "cost effective" than making donations. Most rich people are already famous, so I don't think that they are donating money out of the desire for attention.
Nobody is supposed to brag about donating money to charity. This shows lack of morals and arrogance, but some rich and famous people think that donations could help them build a better public image of themselves.