I totally agree with Kangaroos comments about those in strata blame others, expect everyone else to pay and someone else to do the work.
But one thing stands out from SmileyHouses (hereinafter referred to as SH) second post. SH says that he brought up the matter of these repairs back in 2008. SH asked then that these works be put into the 10 year sinking fund plan. But this was ignored by the EC/OC. Perhaps if they had taken heed of this matter back then it would have been easier on the hip pocket. And perhaps if they had tackled the problem back then it would have been cheaper for each owner. Over the last 5 years no doubt the concrete cancer had only increased as has the cost of living not to mention the cost of materials and labour. Would have been cheaper 5 years ago.
Not to mention the fact that if they had started some kind of special levy and if extra money was collected each quarter for the past 5 years how much money they would already have in the bank to go towards the costs. Much easier to raise a some money over the years than find $60,000 at once.
If you want to make a claim against anyone, I would be looking at those who decided not to pay attention to SH back in 2008.