Of course not. At scale you basically need to remove the government from the situation, they're the one regulating health care into a gigantic blimp. Once health care is completely deregulated and the costs drop you won't need to spending anything close to "all [future] money."
Now if you offered me a deal, I could substitute all my taxes, or even everyone's taxes, for charity, yes I would take that in a heartbeat. In all likelihood I think I would probably donate about 10% of my income to charity if there were no taxes, but the government is so terribly ineffectual it might actually beat the 20-30% I pay now.
Look like the effective tax rate has went up rather than down since I started working in 2010, most of which I was closer to the top 1% than the middle 20%. []
There is no savings I can identify there, nor in my tax records, which have only increased in % as I've made more money. And all well above the 10% of the income I would pledge to donate to charity if taxes are eliminated. But yes I have donated to charity on occasion (sometimes formally, sometimes directly in cash to people that needed it), despite the fact I keep getting taxed harder every year and despite the fact the government robs me of ~20-30% of my income under its own bloated forcible charity scheme.
The practical reality is that charity does not meaningfully solve these problems at scale.