Does an employer legally obliged to pay for my wife's health insurance?

My indian employer only pays for my health insurance and is cutting 423 dollars for my wife insurance. Legally, does he has the right to do so ? or he has to pay for my wife/family insurance too legally? 423 is too much and hard to pay. he cuts from my paycheck. My wife is also pregnent. please advice! thanks
--------------------
i stopped reading after " my indian" sigh....
Source