What we really care about is how much the government takes from us ("total cost to employer" - "net payment to employee") and what it provides in return.
What we really care about is how much the government takes from us ("total cost to employer" - "net payment to employee") and what it provides in return.
But in reality, it matters a lot when the tax burden is raised or lowered. Either the employer or the employee will be paying more or less. It's not the same at all. And the people making the decisions know this difference, for sure.
But, I won't deny that our hypothetical employer could also give people a pay rise. And maybe this would translate into higher salaries generally over time. Not impossible! It's all the same pool of money!
It is money allocating for having that employee in the company - it could all go to the employee as far as the company is concerned. It is worth considering how much of that total money the company is spending goes as taxes, and not just the bit that counts against income tax scaling.
But these arguments are always made with the implication that things should change, because otherwise what's the point? And in this situation, suppose things did change, and the tax rates were reduced: now the employee would get the same amount (they weren't paying any tax!) and the employer would get more (they were paying all of it!). And if this applies when the employer pays all of the tax, when it's perhaps obvious this part of the tax burden wasn't the employee's money, it applies when it pays part of it.
(Of course, reading the thread again, this depends on what the definition of "we" is...!)
If I pay €X in tax, I can recover some of that money via tax deductible expenses. If my employers pays that tax, I can’t deduct anything.
For example in Estonia, if you hired somebody for 1000 EUR gross salary (the number that you'd put in a job listing), the employee would receive 896 EUR on their bank account and the state would receive 442 EUR as taxes from the company. This means the cost of this employee's salary is 1338 EUR (1000 EUR gross * 33% social and 0.8% unemployment tax) to the company. This is not optional, the company can't decide to pay less or use the money for other purposes. This would show up as 1000 EUR in statistics for average salaries or comparisons like this.
You could shift this tax burden between employer / employee arbitrarily and say for example that starting next month, social tax will be counted as part of gross. However the employee would still receive 896 EUR to their bank account and the state would still get 442 EUR as taxes and the company would still pay a total of 1338 EUR, but the average gross salary just went up by a third, while nothing actually changed.