He doesn’t need to shiphon anything. All the “donated” money is still in his control. In order to be effective at tax deference you need to separate the concept of who ownes the money and who controls it. As long as you still control it, it doesn’t matter who ownes it. That’s why a donner advised funds and similar concepts are used to reduce taxes or defer them.
In addition it’s also great for asset protection. For example if he gave a personal guarantee on some of the Twitter debt, then moving money into the foundation (as long as his Twitter stint was not fraud) will remove that out of his name and make it untouchable to the banks.
He can now use those funds to support trips to Mars and other projects. For those projects the charity might pay his expenses - for example a flight to attend a meeting in Hawaii. He can even use the money to hire his kids. The kids would have a much lower (w2) tax rate so effectively he reduced tax but kept the money in the family.