Then let's do something to encourage actually investing—putting money into a company, not into the stock market. If I buy shares of, say, APPL today, Apple Inc

Then let's do something to encourage actually investing—putting money into a company, not into the stock market. If I buy shares of, say, APPL today, Apple Inc. doesn't actually get that money. The person who owned those shares before does. Even if I bought up $2B worth of shares, Apple would see none of that money. It is not actually invested in the company in any way. If you want to encourage investing, then you need to find a way to advantage shares being sold directly by the company. (And, frankly, strongly discourage stock buybacks, because that's literally the opposite of investing, and generally only benefits the wealthiest shareholders.)