Well it used to be funded by clubs themselves from their wagering revenue. Since bulk funding came in, NZTR now distribute that to clubs, however they have dictated that funding be used almost entirely for stakes, thus removing clubs' funding for infrastructure.
Why is it incumbent? If it is then NZTR have the option of choosing WHO they fund using the limited amount of funds they have.
Next you will be saying it is incumbent on the NZ Taxpayer to fund your hobby.
When was the last competitive sport you competed in @Thomass aka @bono ? Let me guess tiddlewinks at the local RSA? Sorry I'm meant indoor bowls. I tell you now in my sporting career I had my elbows out and so did everyone else.