It is true that if one has been working overseas for several years, then the likelihood of returning to Estonia tends to decrease. Also, children born overseas will not have childhood memories and personal contacts with cousins and grandparents in Estonia. Their Estonian relatives will be abstract names in letters and photos (unless one is a frequent user of Skype which allows you to see and interact with each other). Estonian language skills may also be poor for overseas children. This leads to less attachment to the homeland, which again increases the likelihood of not returning to Estonia. Interestingly, in Hong Kong during the British colonial years, the British were very aware of this gradual detachment of colonists from friends and relatives in the UK. Many government employees in Hong Kong had compulsory holidays in England. They HAD to go back home (and I believe that they were also paid to do so. The records should be easy to check). The British knew that it was in their interest to have overseas colonists return to the homeland on a regular basis, and they were interested enough to pay for this.