Why no one ever mentions how much companies effectively contribute to various salary and employees income taxes?
Corporate tax is practically nothing.
that's the employee's contribution, not the company's.
I'm not saying the income tax collected is purely coming from the company, but take Amazon for example - their economic activity creates jobs which pay salaries that are taxed.
yes, but the employee would've gotten another job else where, so it's _not_ the company that's creating the taxation benefit! They therefore, should not be given the benefit of attributing that taxation (for PR purposes)!
The company did make some investment which led to the job - but they did said investment for their own benefit, not to create more jobs for which taxation can be levied.