I don't know if this is the case or not with the V50 but you can't judge the cost based on the MSRP. Volvo tends not to cut the MSRP but they will subvent the lease with low rates and inflated residuals. They also tend to throw in certain optiion packages for "free". Lately they are also offering money towards the down payment.
We really have no choice but to compare on MSRP as lease rates etc make things so complex you can't compare. Many other manufacturers offer 0% finance or low lease rates so its not like Volvo does something others don't to lower the cost of their cars.
They do occasioanlly offer packages like Hinda does with an SE package with maybe wheels and florr mats and a few other things but I've never seen them offer a 2500-3800 package for free. For goodness sake if you want a cargo cover you need to buy a 2500 package. Same thing with power seats. They have a total of 6 stand alone options:leather,Nav, keyless drive, heated seats ,booster seats and blind spot information.