As a senior auditor at CPA LLP, you are beginning your first audit of Burnaby Ltd. for the fiscal year ended December 31, 2021. The engagement team consists of you, the engagement partner, and three junior auditors. Burnaby Ltd. is a retail firm that is publicly listed in the TSX (Toronto Stock Exchange). The company was previously audited by another public accounting firm. During the audit, the following scenarios are encountered. Please respond to the scenario below and summarize your response in a report.

When auditing the payroll, the junior auditors studied the company's payroll processing systems, completed an internal control questionnaire for payrolls, and verified the details of 50 payroll transactions during September 2021. No exceptions were found in this test. The only weakness noted was that the company often hires "casual laborers" to work on certain jobs and pays these laborers in cash. The supervisor on every job has control over a petty cash fund (usually $5,000) designated for that purpose and is authorized by management to make such payments. The supervisor submits a list of laborers and amounts paid as "casual labor" to the head office at the end of each week and receives reimbursement. When a job is completed, the supervisor returns any excess cash to the company and the fund is closed out on the books. According to the company's records, about 5% of payroll expenses were handled in this manner during the fiscal year. Based on studies of the client's system, the junior auditors suggest concluding that control risk over payroll transactions was low, except in the area of casual labor, where the risk should be set to maximum. Junior auditors further comment that while controls over payments to casual laborers are poor, there is no effect on the financial statements. Please indicate whether/why you agree or disagree with the junior auditors' assessments.