Only in Utopia is everyone a brain surgeon, a jet pilot, a lawyer or a doctor. Society needs, indeed cannot function without, bus drivers, bank clerks, retail store workers, garbage men, construction trades etc. Maybe things will be different in 100 years, but for now and for all times past, this has held.
Wages will always be a matter of demand and supply. Through loose immigration policies, the government has flooded the labour market with semiskilled, unskilled and other blue collar workers who really have little or no chance of rising above it. Perhaps their children will, but many can't afford children, or if they do have children, live 4 to a bedroom.
That's why the median wage is so low, and constantly losing ground when inflation is taken into account. Median means the 50% percentile, so it's not some minor, lazy, unmotivated segment as you so condescendingly call them.