The question as to whether direct labor is a variable cost is interesting from a cost$-$estimation perspective, but it also presents an interesting ethical issue. Direct material is always a variable cost. At the other extreme, depreciation on fixed facilities and infrastructure typically is not. What about direct labor? Here, it depends on the ability and willingness of management to adjust the labor force to meet current needs. If management is able and willing to hire workers as needed and lay them off when activity declines, direct labor would be a variable cost. The contemporary trend at many companies seems to be in this direction. $$Companies are looking first to bring in contract workers that they can quickly tap and zap without paying any benefits or severance.$$ In fact, the temps have recently been the fastest$-$growing sector of employment. $$And they aren$$t accounted for as regular employees. This helps companies that use a lot of them, like Cisco Systems Inc., to drive up revenue per employee.$$The growing use of the just$-$in$-$time workforce is not the only means by which companies are priming the productivity pump. Workers complain that many employers are taking advantage of outdated labor laws by misclassifying them as

salaried$-$exempt so they can skirt overtime pay. Walmart, Taco Bell, Starbucks, and U$-$Haul, among others, have been slapped with class actions. In the case of General Dynamics Corp., this resulted in a $$100$ million award that is now on appeal. At Farmers Insurance, employees got $$90$ million. Some employers are so worried about the issue that they are now doing wage$-$and$-$hour audits.$$

Is it ethical to $$tap and zap$$ employees?