Regardless of how it was funded it was never enough. Clubs needed to get alternative revenue.
The whole Club funding model is crap. Make the stakes portion of the wagering revenue contestable based on a number of key metrics.
However a Club still needs other sources of revenue.
Your model would only fund less than 10 racecourses IF they didnt have other sources of funding.
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.