Is it permissible to accept minutes not worked for in the salary, and to deceive at work under the pretext of exerting maximum effort, in order to counter the employer’s attempt to double the workload?

The questioner's intent in the first question is unclear, but if the company pays an employee for minutes not worked, it is impermissible to take this payment unless with the consent of the owning or authorized officials who are aware of it, or if the company's regulations permit it.

As for the second question, it is not permissible to deceive or lie by claiming that this is the utmost effort and capability, rather, the contract with the company must be fulfilled. However, if the work is arduous or unbearable, there is no harm in stating the true capacity for work. In this regard, it should be noted that what is tolerable for a short period may not be tolerable for a long period.