Final answer:
Factors that have fueled the dramatic increase in demand for internal audit services over the past 30 years include the shift to service industries, globalization and increased competition, and reduced desire for unions.
Step-by-step explanation:
The dramatic increase in demand for internal audit services over the past 30 years can be attributed to several factors. Firstly, the shift from manufacturing to service industries has led to a greater need for internal audits to ensure efficient and effective operations in these sectors. Secondly, the force of globalization and increased competition from foreign producers has necessitated internal audits to monitor and manage risks associated with international trade. Lastly, the reduced desire for unions because of workplace protection laws has placed greater emphasis on internal audits for ensuring compliance and ethical behavior.