Top income tax bracket in Belgium is 50%, but this is after the employer has paid ~30% of that in social security contributions. So your 35K EUR net salary costs your employer roughly 100K (I rounded up, so this is an exaggeration). And you get a whopping 21% VAT rate, a dividend tax of 30%, several other taxes which are seemingly aimed at dissuading people from investing. Oh and there's a corporate profit tax of ~33%.

Long story short: run for the hills, don't come to Belgium.