It's nothing new, unethical, impossible, or unheard of to allocate two portfolios to the same person. However, there is no compulsion or practicality in paying two salaries to the same individual. Definitely, there cannot be two full salaries for the same person. Instead, an additional sum is paid to compensate for or remunerate the additional responsibilities shouldered. Such an arrangement is common, and there is nothing wrong or prohibited about it. Personally, I have shouldered such responsibilities attached to top posts in a CPSU and have been paid additional remuneration for it. I have held on to not just one or two, but three portfolios simultaneously. For example, a Production Engineer may be asked to also oversee maintenance, or a Finance Manager may be tasked with administration or HR responsibilities.
In many organizations, these types of arrangements are made as stop-gap measures, especially when vacancies arise due to retirement, resignation, removal, or when the incumbent is on leave or transferred. In the government sector, it's referred to as Officiating or Additional, while in PSUs, it's termed as Acting. You are free to designate it as you see fit. However, there may be statutory posts that require individuals appointed exclusively, in which case such arrangements cannot be made. In some private firms, particularly those managed by family members, this practice may be common. There could be instances where a senior employee has a lighter workload and can be asked to take on additional responsibilities or share the workload when pressure is felt.
It is essential to exercise caution, as at times, such arrangements may lead to confusion if roles are not clearly defined. The effectiveness of this practice depends on the circumstances.
I hope this helps clarify the situation.
Best regards,
Regards