I'm not sure I quite understand the structure, but it does look relatively high:
https://en.wikipedia.org/wiki/Taxation_in_Portugal
The calculator here shows it's not anywhere near 88% though in most cases: https://investomatica.com/income-tax-calculator/portugal
Income Before Tax 80 000 €
Income Tax - 25 472 €
Solidarity Rate Tax 0 €
Social Security - 8 800 €
Total Tax - 34 272 €
Take Home Pay 45 728 €
Total Deductions - 8 800 €
Average Tax Rate 42,8 %
Disclaimer: of course this varies significantly based on freelancing, government employee status, etc.