What's a realistic possibility that goes too far, in your mind? I'm willing to be educated, but so far you're just playing devil's advocate. What would a system that goes too far look like, and has one ever been implemented?
For example, an estate tax of 100% would probably be going to far, but seems unrealistic, as well.
To preface, black graduation rates are probably the largest contributing factor limiting income mobility in America. Any policy discussion should start there.
We could put in a reward system to get grad rates up, but this could be gamed and produce the opposite result. Putting policies in that lower the hurdle rate so potential can be realized but effect no change go too far.
It's certainly possible they have unique circumstancdes behind their mobility, not applicable here.
It's also possible that greater mobility will be a short lived phenomenon. As far as I am concerned, American mobility begins and ends with education availability. Tax policy, safety nets, all the other rhetoric is a distraction to the economic changes underlying the allegedly widening wealth divide. We transitioned from an industrial society where our Lewis Turning Point demanded high wages & on the job training to a surplus of manual labor & more intellectually oriented workforce. That environment benefits the wealthy who have the insight to figure out what changes to make & have the means to fund higher education. Poor people often don't have the first clue about industry & fail to see the benefits of education.
This is my greatest criticism of Obama. He failed miserably at helping the jobless poor transition into modern professions in a time when they needed help the most. Why he and his democratically controlled legislature chose to cut higher education funding while bumping military spending enormously will forever be a mystery to me.
We have not achieved perfect potential. It seems to me we are not even close to optimal potential for mobility.
I could agreed we have not realized our existing perfect potential, but the potential is there. Agreed on the second sentence over the last few decades.