Part of the top ten of the recent Forbes 400 list -
6. Christy Walton, $27.9 Billion
7. Jim Walton, $26.8 Billion
8. Alice Walton, $26.3 Billion
9. S. Robson Walton, $26.1 Billion
Obviously Sam coulda shared some of those billions with labor instead of pocketing it to give to heirs.