The difference is that the other 7.5% (plus a few more such line items) don't appear in your progressive tax rate, and they also don't appear in "how much do you earn in country X" comparisons.
In most countries, even the first 7.5% don't apear in your tax rate.
But still, if you count everything together, for a 2keur net paycheck you have to charge your customers 4.8k in my country (slovenia), and the government takes 2.8k (social benefits, pension, health, income tax and VAT). Say what you want, but 4.8k->2k is a huge amount of taxes.
