But that's an economically ignorant argument.
Look, it's very simple. Technology drives economic productivity which in turn drives the increase in economic wealth. The U.S. didn't industrialize in the south using slave labor.
So you can pretend there is some secret economic sauce to slavery that allowed plantation owners to add value, but it's only a just-so story you're making up by using words like technology and slavery in the same sentence.
Technology lowers the cost of production. Thats the value add. I work in IT as an engineer (nope, I'm not a moocher by your definition, AND I'm black..did your head just explode?). Most (but not all) of the work I've done has been business process automation. Automating things that humans can do (and have done for decades) but that are simply more efficient to do them without humans. What does "more efficient" mean? That its more profitable because labor costs go down and it frees up humans to do other things (or just be unemployed). Thats because there is a market for labor (its limited and its expensive). If there were an abundance of humans that would do the work for free than technology would add no value at all. Which is why slavery added value, why they were property, and why they were considered valuable assets. If slavery never fell out of vogue, the purchase of a slave today would be considered an capital expenditure in much the same way that the purchase of a computer or the funding of a software project is.
You're confusing correlation with causation. When Bush tried to help out blacks and Hispanics with his minority homeownership program, he only helped to increase the dimensions of a housing bubble that eventually hurt everyone's prosperity when it popped. Because they were economically unprepared to own homes.
Wealth has nothing to do with homeownership, except as a correlation.
Did you read the article? Before 1933, a home mortgage required a big down payment and had to be repaid in 10 years. That put homeownership out of the reach of most Americans.
“In 1930, only 30 percent of Americans owned their own homes; by 1960, more than 60 percent were home owners. Home ownership became an emblem of American citizenship.”
The FHA backing private mortgages caused interest rates to fall and allowed banks to make 30 year loans. Thats what created the massive market for housing in America.
There were black people who could afford 30-year fixed mortgages but they were denied them because the banks wouldn't loan to blacks. The reason? The FHA wouldn't insure a mortgage for a house in an undesirable area. The presence of blacks was deemed undesirable by the FHA.
The FHA policy meant that whites that weren't racist HAD to avoid living around blacks in order to protect their property values. As a result, blacks were funneled into public housing and "contract buying" which created the ghettos which led to the bad schools.
Of course, Bush's housing policy wouldn't have fixed this issue. Mainly because the damage was already done. By that point, there had already been a number of generations who grew up in deficient schools that it didn't matter. But also because it was fueled by sub-prime mortgages where as the previous housing boom (that benefited white mostly) was fueled by safe FHA backed 30 year fixed mortgages. Thats why one housing policy created wealth and the other didn't.