I'm pretty sure the revenues on Wikipedia are off, and I can't find what reference they're using to get that number.
This study from around 2002/2003 puts their revenues at $8 billion annually with 60,000 employees. That puts their per-employee revenues at around $133k.
It looks like I got confused because whoever edited the wikipedia article came from a country that uses '.' as a thousands separator.
Looking more closely, they're a strange sort of conglomerate. At a glance, I see two banks, two insurance companies, roughly two hundred industrial companies, a dozen retail shops, a dozen food-related businesses, a dozen research firms, and ten education companies.
In a way, it reminds me of Idealab, in that each new company is a new pool of equity (with the associated incentives that result from ownership), and that failures are not punished, but rather result in retraining or placement in a different firm. (for full co-op members).
It's also interesting to see that the founder was a priest who started off with a co-operative polytechnic school and bootstrapped everything from that base.
174/employee was calculated by assuming that the period in the number of employees is a comma while the period in revenue is a period (e.g. 17M/85K employees instead of 17B/85K employees).
So those figures would indicate 174,000 Euros per employee, which makes a lot more sense.
