Is he funding lobbyists to affect this kind of change? No.
Is he employing top tier accountants to make sure he doesn't pay his fair share like the poors? Betcha.
Does he funnel his wealth into charitable foundations that are a tax write off leading to him getting money rather than having to pay it, while it stays in an eco system he has full control over? Betcha.
Is he buying expensive art, property, etc. to incur expenses that are tax write offs? Betcha.
Since I'm not a Billionaire, I won't be able to tell you all the ways that cunt is 100% pushing for a status quo while putting out fluff pieces like these that make him look good while doing literally nothing to affect the change he supposedly wants.
Wouldn't even be surprised if this was something to get out ahead of some revelations about tax evasion, so if you ever search up Bill Gates taxes, all you get is this curated nonsense of what a stand up good lad he is, trying oh so hard to pay his fair share. Why won't anyone take his money? Poor Bill. Must be hard not getting taxed and being utterly powerless to do anything about that. Shucks. Now he has to go another decade without ever coming close to paying his fair share.
Oh, also garbage takes like these, where he publicly opposed new tax plans - but it's fine, it was all cute and the audience laughed and he payed soooo much, sooo many taxes. https://youtu.be/dXxP4S_WwS0