I hear that it is true
thats why companies recruite Sri Lankans, Philipinos and western.
The coutnry as a whole has a quota for all nationalities again it stem down to each company. I mean each company has its own quota for nationalties as per the profession, say India Accountants, Sri Lankan Accoutants etc.
The labour dept or immigration dept maintains this quota
It applies even when you apply for family visa (wife, childrend)
As such, plan your move WHEN AND ONLY you obtain the WORK VISA. DONT do anything based on BUSINESS visa.