HR is generally seen as being anti-employee, in the sense that the reason they exist is to protect the company (legally speaking) by managing its relationships, benefits, compensation, etc., with employees, and this often pits the company's interests against those of the employees.
It's quite silly for anyone to see HR this way in the first place. They get paid by the employer. Union execs get paid by employees. Figure out which is pro employee.
Depends on which union, really. Corruption is a real problem in some of them, and in others the will to fight is weak or state laws make them much less powerful.
