I really hope this conversation doesn't restart, because it isn't that simple. It's just not worth getting into. A bit harder to do on a $100k gross salary, but on a $200k or higher gross salary there's a bunch of things people and their accountants do so that they're paying far less than %30 average tax on their income in Canada. Also I can say for Germany, people personally talk about net ("Netto") about their own salary, but not so much about a job that's just posted: then you often talk about gross ("Brutto"). Reason: it's up to personal circumstances. In addition to income taxes and deductions, that's due to health insurance for example, which is paid by both employee and employer in Germany, and is also deducted from the gross salary to arrive at net. Although health insurance is generally a % of income in Germany, in most cases you have a huge variety of choices which massively affect how much you'll be paying. (Various public & non-profit/group health insurances; plus private insurance options that range from very expensive gold-plated to dirt-cheap with high yearly deductible.) There simply isn't a set "net" salary for a given job.
Italy seems to be a special case, where it's advantageous for employers to directly pay the income tax on behalf of their employees, so that there can be a reasonable idea of a set "net" salary. But that's all I know about the Italian tax system. (Do they not have other up-front salary deductions that affect net salary; or deductible expenses that impact the effective tax rate paid?)
Too confusing and not worth it for a footy forum! And this won't be the first or last time that this forum and many other places get confused about how much salary is actually paid to a player for a year.