James Taggart was endeavoring to run Taggart Transcontinental as a zero sum game.
The parallel to the Kennedy's is that they want to run the country that way, except, of course, for them.
In the case of Taggart, if one desires to run their business to simply break even, then that's their prerogative and they only hurt themselves.
On the other hand, the Kennedy's (and the liberals in general) want to run the country that way at the cost of the taxpayer.
The "zero-sum game" concept is one of the things that seems to separate liberals and conservatives. Liberals can't or won't see that if wealth is created, more people benefit. The firmly believe that every dollar I make is a dollar that someone else won't make.