Corporate America asks the Supreme Court to legalize gay marriage
The bottom line is that creating a second class of citizen (i.e., gay people) makes things very difficult for corporations who employ them and want to offer them benefits without running afoul of local laws.
Discrimination takes hard work and effort and dedicated HR people after all. It's bad for the bottom line.
For companies operating in the states where same-sex marriage is legal, the ban on federal benefits under the law has proved a headache. Contradictory marriage laws in different states have also complicated benefits and other programs of companies operating in multiple states.
Treating heterosexual and same-sex married employees differently under federal law, the brief said, imposed high administrative costs as companies maintained dual systems of tax withholding and payroll. It results in extra tax burdens for both companies and employees with health plans, and can affect payments including retirement, pension and life insurance as well as having a bad effect on morale.
. . .