If you're saying that mismanagement and corruption are issues, then yes, of course you're right. But then again, remind me how much is the top bracket in Belgium? Austria? Germany? Denmark? Sweden? Much better run countries (in superficial evaluation at least), yet all have 50%+ tax rates at the top.
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.