Earlier quoted context omitted.
As a Belgian, I can't help but look at these numbers in disbelief. 100-200k/annum for churning out code 40 hours a week? Where do I sign up for this? I'm the best paid employee I know, work insane hours, and I'm not even in that bracket. Addendum: it's very rare to make more than twice the average wage in Belgium as an employee. It's a different matter if you're self employed.
As a Belgian myself: self-employment is the key here. It's not that hard to pull in 100-200K annually in the current belgian tech space, I've done it consistently for the past 5 years, with lots of periods where I did not work full time.
Is your daily rate very high, are you delegating work to other people, or what is it?