Super tax concerns rattle investors UBS Wealth Management Australia boss Mike Chisholm has warned that a "a huge amount of fear" has been building among its clients about the potential increases in taxation on superannuation, with some of its customers already starting to act to circumvent any changes this year. Speaking at a roundtable in Sydney, Mr Chisholm said: "What we are saying to the clients is that we don't know what's going to happen, but let's take a balanced approach.