In light of the recent dropping of spouses by UPS, you should be aware that, under Health Care Reform, you are not required to cover spouses. This gives you several options…
1) Not allow them to be covered at all
2) Surcharge them if they have other coverage but elect yours
3) Make them ineligible if they have other coverage available
Note that if a spouse has coverage available under your plan, but cannot afford it, they still cannot get a subsidy on the exchanges!