What are "wages"? Is it different from "salary"?

Article 97(f) by itself is explicit that commission is included in the definition of the term "wage". It has been repeatedly declared by the courts that where the law speaks in clear and categorical language, there is no room for interpretation or construction; there is only room for application. A plain and unambiguous statute speaks for itself, and any attempt to make it clearer is vain labor and tends only to obscurity.

The ambiguity between Article 97(f), which defines the term 'wage' and Article XIV of the Collective Bargaining Agreement, Article 284 of the Labor Code and Sections 9(b) and 10 of the Implementing Rules, which mention the terms "pay" and "salary", is more apparent than real. Broadly, the word "salary" means a recompense or consideration made to a person for his pains or industry in another man's business. Whether it be derived from "salarium," or more fancifully from "sal," the pay of the Roman soldier, it carries with it the fundamental idea of compensation for services rendered. Indeed, there is eminent authority for holding that the words "wages" and "salary" are in essence synonymous (Words and Phrases, Vol. 38 Permanent Edition, p. 44 citing Hopkins vs. Cromwell, 85 N.Y.S. 839, 841, 89 App. Div. 481; 38 Am. Jur. 496). "Salary," the etymology of which is the Latin word "salarium," is often used interchangeably with "wage", the etymology of which is the Middle English word "wagen". Both words generally refer to one and the same meaning, that is, a reward or recompense for services performed. Likewise, "pay" is the synonym of "wages" and "salary" (Black's Law Dictionary, 5th Ed.). Inasmuch as the words "wages", "pay" and "salary" have the same meaning, and commission is included in the definition of "wage", the logical conclusion, therefore, is, in the computation of the separation pay of petitioners, their salary base should include also their earned sales commissions. (G.R. No. 50999-51000, March 23, 1990)
The term "wage" was defined in Article 97(f) of the Labor Code as "the remuneration or earnings, however, designated, capable of being expressed in terms of money, whether fixed or ascertained on a time, task, piece, or commission basis, or other method of calculating the unwritten contract of employment for work done or to be done, or for services rendered or to be rendered and includes the fair and reasonable value, as determined by the Secretary of Labor, of board, lodging, or other facilities customarily furnished by the employer to the employee. Wages shall be paid only by means of legal tender. The only instance when an employer is permitted to pay wages in forms other than legal tender, that is, by checks or money order, is when the circumstances prescribed in the second paragraph of Article 102 are present. (G.R. No. 149464, October 19, 2004)