I don't think the grass does always seem greener to be honest.
When we moved to America it was not actually a desire to travel or because we thought it would be better but because a university there made my husband a graduate (funded) offer we didn't want him to have to turn down.
We really didn't want to go - and had mixed feelings in the weeks beford we actually left - but once we got over the move it was just so easy to live there compared to our life here in the UK.
I often feel that Australia must be similar by the way people who know it speak of it.
We were of course fortunate with a Blue Cross health care package too so that made life easier.
However, when it was time to come "home" we really didn't want to do that. We were settled in a "new life" and it seemed a sad to uproot again.
Maybe some have a feeling that they are missing something or that life is better elsewhere but really I think most people are content in their home so long as things are muddling along OK.
49,000 migrants invade Spanish enclave in 24 hours
Today the High Court has agreed that children can be given puberty blockers.
The Devil In The Family: The Fall of Ruby Franke - BBC IPlayer

