Could we treat it like the lottery? Put $x into a fund each year that grows to ridiculous levels for unambiguous cures for cancer(s) along the lines of the rece

Could we treat it like the lottery? Put $x into a fund each year that grows to ridiculous levels for unambiguous cures for cancer(s) along the lines of the recent cure for Hepatitis C. On March 27, 2019 the Powerball prize was up to $750 million. People were going out of their mind buying Powerball tickets. A system like this would: 1) Make rewards commensurate with difficulty 2) Allow companies to recoup all or part of their R&D investment before even selling their cure