Yes, insurance is offered as a Benefit by Companies and is not set in stone, should the premiums go up your payments go up. If the Company feels it can't or won't keep paying the percentage of the total they have been, your payment goes up. Just consider this, if you were to get your own personal Medical Insurance( Med.only! No Eye, Dental,etc.) your cost would run anywhere between $700.00 and $2000.00 a month depending upon how much of a deductible you choose to pay a year. If you feel you can get a better deal on Insurance, check around and switch.
Yes. However, you are not obligated to continue with your company's insurance policy, you are entitled to obtain a policy with a private company. Unless I missed something, you stated he is paying the increase so how are you affected?