In the 1954 Internal Revenue Code, a Republican Congress changed forty-year, straight-line depreciation for buildings to permit 'accelerated depreciation' of greenfield income-producing property in seven years. By enabling owners to depreciate or write off the value of a building in such a short time, the law created a gigantic hidden subsidy for the developers of cheap new commercial buildings located on strips. Accelerated depreciation not only encouraged poor construction, it also discouraged maintenance...After time, the result was abandonment.