"The best hint for this is that most (>70%) of the money goes into salaries. Not software." I'm not sure what that proves, considering all the languages we're

"The best hint for this is that most (>70%) of the money goes into salaries. Not software." I'm not sure what that proves, considering all the languages we're talking about are free, and the largest price you have to pay is probably for the IDE (which also tends to be free).