Your post sounds like the Giving Pledge is responsible for the lack of an enforceable wealth tax

Its the exploitation of a large loophole built to facilitate private philanthropy. But philanthropy, in practice, is little more than a modern patronage system. When you get under the hood of the Hoover Institute or the Federalist Society or the Lily Endowment or the Bill and Melinda Gates Foundation, what you discover is a jobs program for lobbyists and sectarian organizers.

The Giving Pledge is merely feel-good PR that the leeches imposed upon themselves to calm their minds over the obvious cognitive dissonance.

Its much more than that. It is a mechanism by which billionaires organize their wealth to finance and propagate ideology. A century ago, we had churches and craft guilds and political parties to achieve these goals. Now we have a constellation of private charities and billionaire-financed clubs and secret societies.

“The Giving Pledge” is a strategy to transform Boomer-Era wealth into an institutional structure and give the property and revenues accrued during the 20th century a direction and purpose going into the 21st century. It is about permanently tax-shielding trillions of dollars in accumulated capital and equity behind tightly knit groups of people with a financial incentive to never let state or federal institutions touch it.