I'd be really interested to hear your definition of capitalism, because I think you are confusing ideals. It appears you are tying capitalism to a tax structure or some other government program to promote equity. Capitalism is simply using a market economy rather than command economy.
China has used capitalistic market principals from the 1970s to greatly benefit the wealth of its population, as opposed to the Mao era command economy which clearly failed. If you look at poverty in the world from the 1970s you will clearly see the China's reopening greatly reduced world poverty (mostly because their population is a major proportion of the world's).
https://ourworldindata.org/extreme-poverty
https://www.zdnet.com/article/study-world-poverty-rates-plum...
Capitalism recognizes that a competitive market driven economy relies on governmental controls to protect against market failures, externalities, and imperfections. These are knowns in American economic academia.
Because the government of America fails to give appropriate, or lack-thereof, government control in the face of some of these issues (such as healthcare) does not mean that the capitalism concept is incorrect. It means that the federalistic, two party, republic has not properly regulated some issues as recognized by standard economic practices.
However, give me concrete examples of other governments that better protect against "when the measure of a man is the depth of his pockets then the world shall be ran by clowns" abuses while not removing blatant freedoms, and give specific changes you propose. Sitting on the side of "capitalism is for pigs" is much easier than actually studying and solving the problem.