It is incorrect to state that "Native Hawaiians " have not contributed to the artwork of the columns.   The make up of the concrete  for the columns themselves is made with sand taken from Wailuku/Waikapu on Maui ... the sand of Mauilani which contain the bones ('iwi) of ancient Kanaka Maoli.  Now all but one of the many Pu'u of the area have been destroyed, leveled over time by sand sent to O'ahu  over decades of desecration for the sake of progress,  development and cement high rises in Honolulu. 

Oh, but these truths are kept hidden from the public.  Truths people don't want to know as they attempt to blend all Polynesian cultures under one Asian umbrella.  

People should be educated; for the sacrifices of Kanaka Maoli are not buried deep in the past; their sacrifices occur everyday.  The bones of the warriors of Kepaniwai are forever embedded in Honolulu concrete; not surprised some of those towers are cracking and others sit in sink holes.  Art seems premature considering that.