Anthropic to commit 5% of its shares to a fund for the 'public good'

Anthropic has said it will commit 5% of its shares to a fund for the "public good" as it prepares for a stock market listing, a pledge the Guardian puts at $48bn. The Guardian

the GuardianAI firm Anthropic to commit 5% of shares to fund for ‘public good’The $48bn giveaway comes amid concerns about the tech and as the company prepares for a stock market listing

What governance would make a fund like this trustworthy, and who should decide how it is spent?