Sentence:  Whether or not it is in the industry 's interest to allow the basic wage rate to rise <WSD>obviously</WSD> depends upon the extent to which the public limit price rises in response to a basic wage increase , and the relation of this response to the increase in costs accompanying the wage increase . 
Meaning of the word marked with <WSD> tags:  unmistakably (`plain' is often used informally for `plainly')