that's because their little pirhanas (those not named Denard Span anyway) are gimps who don't execute defensively well and have no OBP. We're not talking about Tolbert, Punto, and Gomez here. Ellsbury and Ichiro are legitimate big league hitters with solid OBP's and the talent to maintain them.
When they had Punto getting on base, he and Span made it work. Once Punto flatlined, it fell apart. that's not a fault of the straegy, it's a fault of the personnel who executed it.