Pat Gunning wrote: 
> The Keynesians ignored considerations of profitability. 

GT, ch. 11, first sentence:
        WHEN a man buys an investment or capital-asset, he 
        purchases the right to the series of prospective 
        returns, which he expects to obtain from selling its 
        output, after deducting the running expenses of 
        obtaining that output, during the life of the asset.

Cheers,
Alan Isaac