The US Budget was $1.65 Trillion. If a couple billion fed every hungry child in the country (and yes, it would), childhood hunger would be a solved problem. And in the US, it mostly is a solved problem because of a combination of state and federal benefits that deploy money towards feeding and heating needs of poor families. There is also a child tax credit that outright put money in the hands of families with children (last year, I think?). All of that is already happening without your proposed (forced) transfer of the 1%'s wealth to their workers.

It's very easy to demand accountability of billionaires and supremely difficult to collectively hold our political leaders responsible. The law doesn't require billionaires to be accountable to the general public beyond obeying laws and paying taxes that are due, but our public representatives have higher standards to live up to, and our focus should be on them, not billionaires. All the wealth of American billionaires would add up to a couple years' federal budgets (or perhaps less than a year of federal and the top 4 populous states' budgets).