▁decl ining ▁since ▁ 1 9 7 0 . ▁This ▁indicates ▁a ▁shift ▁in ▁income ▁from ▁labor ▁( pers ons ▁who ▁derive ▁income ▁from ▁hour ly ▁w ages ▁and ▁sal aries ) ▁to ▁capital ▁( pers ons ▁who ▁derive ▁income ▁via ▁ownership ▁of ▁business es , ▁land ▁and ▁assets ). ▁W ages ▁and ▁sal aries ▁have ▁fallen ▁from ▁approximately ▁ 5 1 % ▁G DP ▁in ▁ 1 9 7 0 ▁to ▁ 4 3 % ▁G DP ▁in ▁ 2 0 1 3 . ▁Total ▁compens ation ▁has ▁fallen ▁from ▁approximately ▁ 5 8 % ▁G DP ▁in ▁ 1 9 7 0 ▁to ▁ 5 3 % ▁G DP ▁in ▁ 2 0 1 3 . ▁To ▁put ▁this ▁in ▁perspective , ▁five ▁percent ▁of ▁U . S . ▁G DP ▁was ▁approximately ▁$ 8 5 0 ▁billion ▁in ▁ 2 0 1 3 . ▁This ▁represents ▁an ▁additional ▁$ 7 , 0 0 0 ▁in ▁w ages ▁and ▁sal aries ▁for ▁each ▁of ▁the ▁ 1 2 0 ▁million ▁U . S . ▁households . ▁Larry ▁Sum mers ▁estimated ▁in ▁ 2 0 0 7 ▁that ▁the ▁lower ▁ 8 0 % ▁of ▁families ▁were ▁receiving ▁$ 6 6 4 ▁billion ▁less ▁income ▁than ▁they ▁would ▁be ▁with ▁a ▁ 1 9 7 9 ▁income ▁distribution ▁( a ▁period ▁of ▁much ▁greater ▁equality ), ▁or ▁approximately ▁$ 7 , 0 0 0 ▁per ▁family . ▁ ▁Not ▁receiving ▁this ▁income ▁may ▁have ▁led ▁many ▁families ▁to ▁increase ▁their ▁deb t