How different is American immigration policy than other similar countries, like Canada, the UK, Australia, and the author's New Zealand? I'm sympathetic to everyone trying to immigrate to the US, but I'm guessing he would have similar issues in any country. Probably less frustrating, though.
At the moment the UK is somewhat hostile to immigration from outside the EU. The UK government has pledged to reduce the number of immigrants coming into the UK but can't do anything about people coming from within the EU so is targeting immigration from outside the EU.
It is also difficult to get visas for non-EU spouses. Unless you can demonstrate sufficient funds to support them. You either need a good chunk of cash in the bank or a job paying at least 25k GBP per year (more if bringing children). This has made it difficult for a lot ExPats to return home with their families and has caused a lot of anger in that community.
There is also talk of further restrictions on non-EU immigrants such as requiring non-EU immigrants who aren't earning sufficient amounts to leave after 6 years. At the moment its just talk but given the current government it could easily become law.
By "get to" do you mean "live in Australia more or less permanently" or become a citizen? Just clarifying, since the article was discussing the latter.