To add some context, California's tax revenue for 2014-2015 was $130bn. So having an extra $100bn would order-of-magnitude double their income for one year.
It's not clear to me whether or not that would make a big difference. I lean no, because my default assumption is that governments are really bad at spending money, but I could see it going either way.
Of course, there are also poor people outside California, and there's no particular reason to focus on the ones inside.
(I also note that 100 billionaires own considerably more than $100bn between them, but that's a minor nitpick.)
It's not clear to me whether or not that would make a big difference. I lean no, because my default assumption is that governments are really bad at spending money, but I could see it going either way.
Of course, there are also poor people outside California, and there's no particular reason to focus on the ones inside.
(I also note that 100 billionaires own considerably more than $100bn between them, but that's a minor nitpick.)