The question would be--would the money come from general tax revenues or from a special tax which only white Americans must pay? Otherwise some of the money would be coming from black Americans.
That would be unconstitutional.
Then again, we have a Chief Justice who can't figure out what is and isn't a tax.
What about the thousands of blacks who were slave owners? In New Orleans alone there were hree thousand black slave owners. Will their descendants pay reparations?