H1B visa's are a modern form of indentured servitude. The employer knows you can't quit, and if they fire you, you have 6 weeks to somehow find a new job (which is already hard if you are a US citizen or green card holder) or you have to leave the country.
Because of this, H1B workers have no choice but to accept bad pay and working conditions.
Because of this, H1B workers have no choice but to accept bad pay and working conditions.