If you have 2 million migrant workers, 6,500 represents 0.3% of them. And that's over a 10 year period, so that's 0.03% per year.

So you'd need to start getting into the age demographics of the 2 million and cause of death details to determine just how much are "excess deaths".

Now I'm aware of how badly imported labor is treated in the Middle East, but you really need more info than this article supplies to know how bad it really is.