In 1985, 20 dollar notes were introduced, whilst, in 1993, a 10 dollar coin was introduced and the banks stopped issuing 10 dollar notes.

He also declared the trillion dollar coin debate to be the most important fiscal policy debate of our lifetimes.

There have been various issued by banks which were phased out with the introduction of the ten dollar coin in 1994.

It was issued in 1975, and thus became the highest denomination coin until the five dollar coin was introduced the next year.

In early 2013, he was a prominent supporter of a potential trillion dollar coin, although by late 2013 he had changed his mind.