sample email to the senior management including the below points -

1. Offshore IT team has shown frustration multiple times to the onsite managers mentioning that management is not distributing the work properly which is hampering their confidence, ability to work smarter, health, and work life balance.

2. Not able to replace non productive people for many months which destroys team's morale.

3. People are using lame excuses to stay away from work.

the solution is to use offshore manager's expertise in technical solutioning more, offshore manage to perform HR activities while onsite management will control the delivery and distribution of work.

also, need to ask for any suggestions from the senior management to handle the situation differently.