elaborate
Not everyone who gets cancer dies.
People dying won't solve any economic problems.
Cancer is nature's way of trying to stop overpopulation and humans need to stop fighting nature.
No, that would be the mosquito. We've been against nature since we emerged from Africa.
Basically, curing cancer will increase overpopulation, putting more countries and people in poverty, which can result in death and higher debts.
Not necessarily true, it could be the opposite. More people alive means more people spending money, and infrastructure will adapt around this.