Business leaders will never advertise for workers if there's a shortage so it's impossible to know who needs what and in what quantity.
It's in the best interest of business leaders to have a slight oversupply of workers in many occupations IN ORDER TO KEEP WAGES DOWN or DRIVE WAGES DOWN.
I don't think education was ever about helping the low status person move up, it was about businesses and organization paying less for skilled labor.
However, in some areas, there are shortages of personnel. The shortages exist because the work is usually very demanding or barriers of entry are high.