> Low capital gains tax incentivizes investment and venture capital, so the rich can grow their wealth faster than the poor, while creating a job market.

You forgot the most important part. Let me add it for you: "Low capital gains tax incentivizes investment..., while creating a job market, [and, more importantly, providing goods and services that are beneficial to society as a whole]."

> The former creates more liquid assets (stock) with no clear connection towards meeting the needs of regular people. The latter creates more solid assets with no clear connection towards meeting the needs of regular people.

These claims are demonstrably false. Paper assets provide no tangible benefits. You cannot eat a stock certificate, nor can you use it to heal an infection, nor can you ask it to repair your refrigerator. To receive a tangible benefit such as these, you must consume a good or service. And what is the economy but a machine that produces the goods and services that the people within it consume? Therefore, it is the mix of goods and services consumed (which equals that produced) that determines how society benefits. And, as you've already admitted, a low capital gains tax incentivizes the wealthy to buy paper assets instead of luxuries for themselves. But luxuries are real goods and services, aren't they? In other words, doesn't that policy incentivize wealthy people to consume less and, therefore, claim a reduced share of economic benefits? Consequently, doesn't an increased share of economic benefits go to "regular people"?