Isaac's post is spot on. The NBL is about making money and the teams want to win.
e.g., NBL is okay with overpaying USA high school graduates $100,000 to be a 4th import because it sees it as an investment to raise the profile of the league and make more money; Sydney see giving Bogut part of the business as a way to do both - increase revenue and chances of a championship.
So rephrase your question - would anyone in NBL think that paying Jock Landale/whoever $200,000 to play would get them that much back in additional income or increase their chances of winning enough to warrant it?