Wolfram employeees sign contracts giving Dr Wolfram credit for their work, in exchange for their pay.
Of course, the extent to which the law is actually applied in Europe depends on the conditions of employment and whether the employees have the time and resources to wage a legal war against their employers.
Ultimately, how much did the individual contribute? There's a middle ground where we need to encourage individual efforts, but I feel like our society is biased to not recognizing the efforts of the whole.
That's what the money is for