You can define a maximum budget in the company guidelines that applies to all employees in your company.
To adjust the budget individually for an employee, click on the eye in the list of all users for the relevant employee.
There you can revise the policies per employee by selecting the desired action from the drop-down menu. The number of wheels can also be updated here. Then click on the arrow to get to the correct mask.
Then you update the setting and the order code is released for a higher/lower amount.