Your definition of "wealthier" is stupid, though, because it relies on a measure that doesn't actually apply to the person in question. A share's price is just "the last sale price of the same type of share", and that is multiplied by the person's shareholding to get their "wealth". However they don't have any more money by this happening - it's just a huge assumption that the share price would stay the same across all their shares if they sold right now.
replyThe time we actually know what money they would make, making it concrete for tax, is when they sell. And we already do this.
There's multiple advantages to making money from equities that people who make money from ordinary income simply do not have, favourable tax rates, the ability to choose when and how much to realize, the ability to loss harvest, compound interest, everything around how we tax these 2 forms of income is set up to beget inequality.
reply> everything around how we tax these 2 forms of income is set up to beget inequality
replyNo it's not. Most people don't pay capital gains because things like houses don't have capital gains applied. I.e. the rules are set up so that most people avoid capital gains tax when they gain capital. Everyone pays income tax with the same rules, and some people pay capital gains tax as well if their risks pay off. We tax the profits and let investors absorb the losses.