The Gates Foundation incidentally is one of the strongest voices in the push for Open Access. As a large and influential scientific funder, they were one of the first to demand research they funded to be OA, and recently one of the first non-founding parties to sign up for the strongest push for OA so far: Plan S.
Unfortunately, it's not a problem you can solve just by throwing money at it. It's primarily an incentive problem, and the only influence the Gates Foundation has on that is through its funding of research. In that regard, it's doing very well.
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The Gates Foundation incidentally is one of the strongest voices in the push for Open Access. As a large and influential scientific funder, they were one of the first to demand research they funded to be OA, and recently one of the first non-founding parties to sign up for the strongest push for OA so far: Plan S.
Unfortunately, it's not a problem you can solve just by throwing money at it. It's primarily an incentive problem, and the only influence the Gates Foundation has on that is through its funding of research. In that regard, it's doing very well.