I don't see a flaw in Malthus' argument (population grows exponentially, food production does not). The green revolution mostly pushed it back a couple of decades (except for people here and there who actually did starve to death) through modernizing worldwide agriculture and massive use of petroleum as fertilizer and pesticide, but it can't be repeated--oil probably already peaked and we don't have even more advanced farming techniques held in reserve. The incentives are right but they only help if some feasible solution exists; I'm not aware of any short of inventing nanotech or invent cold fusion (scaling fission is too slow because we have to mine all our fuel) or an extremely authoritarian yet effective sterilization campaign (which would make China's look like Disneyland).