An example of using bribery to engage in union busting would be

a company hiring scabs to replace striking workers.

a manager paying an employee to spy on union members.

a company threatening to fire union members.

a manager threatening to harm any pro-union workers.

A manager paying an employee to spy on union members.

Managers at the turn of the century had union for obvious reasons, including the fact that it gave them less power over the control of wages, business hours, and expenses of the company like electricity. Managers would subsequently pay, or bribe, someone he trusted to spy on and potentially harm or fire the employee that was part of a union.

A manager paying an employee to spy on union members is an example of bribery used to engage union busting.