Yes, which proves the point, no? In Q1 of 1979 the real median wages were 335. In Q3 of 2014 they were 336. Which means that from 1979 to 2014 workers did not see any increase in their salary. In that same period, GDP per capita (and thus the economic output of the country and thus the economic output of its workers) almost doubled. The country became richer, workers became more efficient, but they did not get any part of the gains.
Just FYI: Belgium has 4 unicorns, not 2 (Odoo, Deliverect, Collibra and Team.blue). We also have a similar thing to the PayPal mafia in Belgium: the Netlog mafia (with people like Lorenz Bogaert).
Greetings from a fellow KUL FirW Alum ;)