True, but leaving health and pension in or out the gross salary makes a big difference if you want to compare gross salaries.
But...employee is always the only one who have to create value for customer who will give company his money. It doesnt matter who pay taxes (even health or social "insurance" are kind of taxes) value needs to be created and customer needs to be charged. Employer will not pay (long terrrm view) your bills and taxes from own pocket (dont consider early startup phases)