“What a “fair share” of taxes means in practice is simply “more.” No matter how high the tax rate is on people with a given income, you can always raise the tax rate further by saying that they are still not paying their “fair share.””
Sound familiar? Same with guns. No matter what laws they already put in place, they always want more.
To be honest, Liberals believe that all wealth in any form belongs to them as the guardians of the Utopian state; it is only their altruism that allows a measure of private use. To them it is from each according to their ability, to each according to their need and all of it under the control of the liberal elites.
I have commented on this as well. They never tell you how much they need, or how short the government is of some revenue goal. Their goal is always "more."