Wal-Mart uses technology to increase sales volume, but the more it does so, the more it drives down profit margins - its own and everybody else's. The same logic does not appear to hold for Goldman Sachs.

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“Wal-Mart uses technology to increase sales volume, but the more it does so, the more it drives down profit margins - its own and everybody else's. The same logic does not appear to hold for Goldman Sachs.”