detach itself from the liability of Proxy, AIMS must show by clear and convincing evidence that its contract is limited to Lacerna’s employment by Low See Ting.   However, aside from its bare allegation, AIMS presented no proof to corroborate its claim.  On the contrary, it appears that in transferring Lacerna from one employer to another, Proxy did not demand a new placement fee from Lacerna.  This only shows that Proxy’s conduct was in accordance with the original contract executed with AIMS and not on an entirely new and separate agreement entered into in Hong Kong.   This interpretation is in accord with the rule that all doubts in the construction of labor contracts should be resolved in favor of the working class.  The Constitution mandates the protection of labor and the sympathetic concern of the State for the workers conformably to the social justice policy.[13]  Verily, to absolve AIMS from liability based on its unsubstantiated claim that it is not privy to the subsequent employment provided by Proxy for Lacerna would be to undermine the avowed policy of the State.  The joint and solidary liability imposed by law against recruitment agencies and foreign employers is meant to assure the aggrieved worker of immediate and sufficient payment of what is due him.[14]  Thus, Section 10 of R.A. No. 8042, provides:   SEC. 10. Money Claims. –   xxxx   The liability of the principal/employer and the recruitment/placement agency for any and all claims under this section shall be joint and several. This provision shall be incorporated in the contract for overseas employment and shall be a condition precedent for its approval. The performance bond to be filed by the recruitment/placement agency, as provided by law, shall be answerable for all money claims or damages that may be awarded to the workers. If the recruitment/ placement agency is a juridical being, the corporate officers and directors and partners as the case may be, shall themselves be jointly and solidarily liable with the corporation or partnership for the aforesaid claims and damages.   Such liabilities shall continue during the entire period or duration of the employment contract and shall not be affected by any substitution, amendment or modification made locally or in a foreign country of the said contract.   xxxx   In case of termination of overseas employment without just, valid or authorized cause as defined by law or contract, the worker shall be entitled to the full reimbursement of his placement fee with interest at twelve percent (12%) per