I was part of an exact situation. We were training Indians to replace American and European accountants, only because they were cheaper. Their work was lacking - for example our A/P clerks were coding about 20,000 invoices per month with NONE being coded to a suspense account. Our American accountants were closing and reconciling all accounts in a weeks time. We displaced about 70 workers who were replaced by twice as many Indians who still to this day (3 years later) can’t keep up. The only way they could match the invoice totals was to heavily use the suspense account. I don’t ever think that they made the close schedule either. And we noticed that questions are never asked, I guess that they didn’t want to feel dumb in front of Americans. I had one, supposedly degreed accountant, as me, “Why is the December beginning balance the same as the November ending balance?”
That's their culture - a reluctance to admit they don't know.
In the past I've worked with some, and they'd always look at you, smile, and repeatedly say "Yes? yes?" Half hour later, after screwing up Big Time, and there was no way out, they were at the door to my office rocking their heads side to side, saying "I am not understanding".
I loved my teams there. Very sweet people. However they had no incentive to work smarter not harder. When I went to visit and totally ripped up the processes and reduced head count, the BPO wasn’t very happy. Its challenging at best. I had vendors call me because the y didn’t speak “English”. Of course they did, just proper British English. Sad part is those folks saw very little in compensation.