[quote BearOfEasttown]@MrsSkylerWhite
Really, the idea that parents will suddenly need their adult children to care for them after decades of managing very well, thank you, is beyond patronising.
Don't assume you will not need help in your old age/elderly years...
If in turn they decide they want to move to Australia, we shall rejoice in their happiness and visit, often.
WOW. How wonderful for you that you have the money and time to visit Australia - and so often too. Most people are not so fortunate and will very likely never see their family member again if they move to Australia.
They owe us nothing and we owe them nothing.
Wow, what a hideously cold remark. 
I would be really upset if my adult DC fucked off to the other side of the planet, and they would if me and DH did. It will never happen though, as we love each other, and care about each other too much to to do this. I would only move away if I had no-one here who meant anything to me.
I do seriously question the motives and reasons behind people moving 100s and 100s of miles away from family and friends, and everything they know, and I definitely think it very odd when people move 1000s of miles away.
People will say 'work!' or 'career opportunities' .. or 'a shiny new life...' LOL, as if you can't get them in your own country. I do wonder what people are running away from to be honest. Coz they sure are running away from something. Or someone!
You don't move away - permanently - to another country, if you are happy where you are.[/quote]
@BearOfEasttown I do totally agree with this.
In the case of my inlaws they have moved a huge amount of times over the years (before my time). Within the same county up until now but my dh has always said they've never been able to settle and get restless. They are definitely a couple who always need the next bigger and better 'thing' in their lives and don't really seem content. Plus, they can't hold onto money and have come close to losing it all a few times over the years.
People can change location multiple times in a lifetime but wherever you go, you have to take yourself (and troubles) with you. Obviously this doesn't apply to all situations but I think my inlaws are.