Are liberals capable of rational thought?
"Inequality" is a nonsense word intended to foster jealousy and find "evil" where none (or very little) exists.
Inequality is a fact of life, and if you quantify inequality, you will generally find that it increases with time.
Consider academic inequality, as measured by theoretical comprehensive test scores. At the end of his high school education, a lazy, unintelligent person in 1970 achieved a score of, say, 100 in 1970, and the average score of the top 5% was, say 800.
Now, with computers, enhanced communications, new learning tools, the lazy slug at the bottom still scores 100, but the top 5% now scores 900! INEQUALITY HAS INCREASED! So what?
Consider economic inequality. The people at the bottom have a generally worthless education, no skills, aren't willing to work very hard, or alternatively, have run into insurmountable obstacles. Their level of wealth will remain about the same over time. The have no assets, minimal income, and are probably relying on government handouts of one kind of another. And these handouts generally remain about the same in current-year dollar value. But the people at the top are able to take advantage of new technology, new global work and investment opportunities, new income generating possibilities, and enhanced educational experiences. OF COURSE their incomes and assets are going to be increasing at a higher rate than mere inflation. And as a result, INCOME INEQUALITY increases. It is normal. It is natural. It is unavoidable.
The only things Government can do about "income inequality" are to create educational and economic opportunities for those at the bottom. School choice, opening up entrepreneurial opportunities, college academic scholarships. Liberal approaches (mainly these days a higher MW) create more dependency and actually hurt those at the bottom. Hell, at $15/hr no HS dropout will ever get a decent job! You can get a college grad for that money.
The very idea the "income inequality" impedes economic growth is ridiculous. People with super incomes don't necessarily spend all of it. Big discovery! Sometimes they put it into the Bank or into money markets! Outrageous.
And keep in mind that confiscating money from high earners to give it to non-earners is absolutely prohibited by the U.S. Constitution. Not that you Liberals give a shit about that.