BTW, if you want to go into details, feel free to shoot me an email.
So with 4 kEUR gross salary you end up at 5.2 kEUR cash costs. Then there are also non-cash costs, like 5 weeks of paid holidays (or did unions actually achieve the 6th one? It's 30 years I lived in Sweden...)
And you might need an office, equipment, and what not. So the cost can easily be 6-7 kEUR even if the developer sees only 4 kEUR on their payslip.
A few might earn (significantly) more. But that's more likely in corporations higher levels than for open source related development work.
I had a friend who owned a company at the time. His sole criteria for hiring was that net salary + taxes + health insurance + all additional costs (yes, even those "paid by employer") must be <= the money employee earns him.
So when you think you're paying ~32% income tax, in reality it's closer to 50%.
That's some conspiracy bullshit. The first Google hit for "arbetsgivaravgift" gives the site of the Swedish IRS-equivalent, where it's both clearly marked as a tax and the exact percentage is given.
My boss told me he when thinking about our pay he considers the expense to the company to be about 2x what we get paid (pre-tax). So that's the "arbetsgivaravgift" (we got the same thing here in Norway) and pensions on top of our salary.
Unless I also forbid renegotiating salaries, don't you think that after a short amount of time "gross" salaries (effectively salaries net of arbetsgivaravgift) will have adjusted and everything will be the same?
It's not a conspiracy at all. The US does it too with the employer portion of FICA. This is 15.3% for most employees.
Hiding this tax that directly impacts what your cash paycheck will be is certainly political. But conspiracy? Not at all. It's like any other social nudging - keeping it out of sight and out of mind is absolutely on purpose and not really arguable. What is arguable is if it's justified.
No it's not.
That's not even accounting for non-salary costs.
~7-8k EUR effective cost for 1 person-month sounds about right to me.
Edit: Actually, Europe is so diverse that any blanket statement is mostly worthless.