> 1 - I have already paid tax on the money.
Money is taxed over and over all the time. Your income gets taxed, then it's taxed again when you spend it, then it's taxed again when the store owner reports it as earnings, and on and on. There's no rule that once a dollar is taxed it shouldn't be taxed again. But, for some reason, it's only shareholders who complain about how unfair "double taxation" is [1].