what are the advantages and disadvantages of labor unions?
['Pro 2: Unions promote higher wages and better benefits. ... ', 'Pro 3: Unions are economic trend setters. ... ', 'Pro 4: Political organizing is easier. ... ', 'Con 2: Labor unions discourage individuality. ... ', 'Con 3: Unions make it harder to promote and terminate workers. ... ', 'Con 4: Unions can drive up costs.']