How do they know what your tax rate is? Especially in the context of "work from anywhere" as in OP, employees can have a wide variety of tax situations.
The tax rate is flat and there are no deductions. There are no local relative taxes (as in a percentage of your income), everything is in absolute values.
And if you're working from another country, then you're a fiscal resident in that country and you have to pay taxes there. But in that case you'd be a contractor or own a company, so that's a totally different story.