It's broader that that: it's the most efficient way of extracting money from everything else in general.

Hence just how common it is to see large companies getting massive subsidies or having laws written to benefit them (notice, for example, the Disney Corporation rigging the system to extract more value from the broader society by getting the Copyright terms extended ahain and again), none of which is sales or employment related.

Capitalism doesn't limit itself to things of a trading nature (which includes employment, which is basically people selling their work to others) and that's the core of the problem with it: it naturally corrupts anything around it which can help provide not just trade advantages but even force the rest of society to give larger entities "free" money even outside trade (subsidies, bailouts) or forcing into being paid for that which would be naturally free (i.e. copyright, water rights, even land).

Some people think Crony Capitalism is not real Capitalism, but is actually real Capitalism in it's purest form: the best ROI in this game of who makes the most money comes from buying the referees and those who make the rules.