As a noun, "benefit" can mean: 1- "advantage" [countable noun - plural: "benefits"] or 2- "payment from the state." [mass noun - used in the singular] In the above context, meaning #1 would make the sentence unnatural. Therefore, meaning #2 is the right one.
I think the company is far more likely to have a policy on 'benefits' (staff discounts, leave entitlement, luncheon vouchers, subsidised travel, etc) than on state payments.