By default, managers (Agendrix role) can see employee hourly rates. If you want to revoke that right it is possible to do it like so:
1- Go to the ''Settings" tab
2- Click on "Permission management'
3- Uncheck ''Make sensitive people data information visible to managers''
Other impacts
If you choose to deactivate the option the manager will lose the following functionalities
Manage employee hourly rates
Using the labor cost calculator
Export payroll
Export payroll related reports
Visualize the employee cost in the Time and Attendance tab