Yes, the question is how much of a boon it needs to be. The fact of the matter is that people with capital want to invest and grow that capital. It is absolut

Yes, the question is how much of a boon it needs to be. The fact of the matter is that people with capital want to invest and grow that capital. It is absolutely false that if that activity is taxed, it will disappear. Just as obviously, if all capital gains are taxed at 100%, it will disappear. The question is the balance - how much to tax it so that the wealthy don't merely get wealthier at everyone elses' expense. It may also be a good idea to tax underutilized capital, as land is taxed.