I'm replying to a claim that, if we "tax the wealthy" then "children won't need a head start."

I want evidence supporting that claim, that government taxes are better for giving "children a head start" compare to philanthropy.

The OG claim wasn't a claim that they're more effective. It's that it could reduce inequality. By definition it's true. This is simple to prove. If I say, confiscate the wealth of anyone with more than a pot to piss in, and burn it in a fire. Then we would all be equal.