This will be short - "income inequality" is not a cause, but an effect! "Income inequality" is the result of poor preparation on the part of certain individuals. Those who struggle at the bottom of the income ladder, are those who failed to take advantage of educational and/or technical training opportunities. They are the unmotivated - the high school dropouts, the indolent, and those who chose to allow themselves to become dependent upon the government for their support.
They are those who, by their own inaction, have failed to properly prepare themselves for success in the labor market. These people cannot compete for higher paying jobs. They will never become a Chief Executive Officer of anything requiring greater management skills than a yard service. They do not create jobs for more than a very few others (lawnmower pushers), because they lack the organizational skills to build a successful large-scale company.
There's a saying that states, coined by the United Negro College Fund in 1972 (prior the the elevation of Negroes to "African-Americans"), "A mind is a terrible thing to waste." The accuracy of that statement cannot reasonably be challenged. Along those same lines, Alexander Pope penned this timeless prose in 1709:
"A little learning is a dangerous thing;
drink deep, or taste not the Pierian spring:
there shallow draughts intoxicate the brain,
and drinking largely sobers us again."
In Greek Mythology, the Pierian Spring of Macedonia was sacred to the Muses.The spring was believed to be a fountain of knowledge that inspires whosoever drinks from it.
To me, Pope's message is a warning that those who learn "just enough" will convince themselves that they have mastered the subject or skill, and become "puffed up" about their knowledge. Whereas those who have mastered the subject/skill, know that which they know. They also know that there may yet be even more to learn, and continue to expand their knowledge, thereby producing improvements their field(s) of endeavor.
Those who know little - and do little - deserve little! Simply being present upon this planet is not sufficient justification for great rewards... or ANY rewards. We must apply ourselves and produce - either independently, or for an employer - before we may reap the benefits of our labors.
Obama's "pipe dream" (originally an allusion to the dreams experienced by smokers of opium pipes) to create income equality lacks viability... unless the goal is the total destruction of the American economy. Requiring others to contribute from their earnings, so that those who choose to retain their energies may profit from doing nothing, is both a morally and logically corrupt concept.