No. Coz all you've succeeded in doing is raise the price of meat to like 500% extra. In one word, INFLATION. Boom. That's why you don't give subsidies willy nilly. Or just simply print more money. (Look where that got Germany in the 20s and 30s. Or even, Malaysia in the dying days of the Japanese Occupation.)
Malaysian ministers dealing with economy and trade take note.
Okay, Malthus goes further. Some would say, well, the working class man would feel richer and go out and buy more stuff, which signals to the market to increase supply. But now it depends on how much the market CAN increase supply. Malthus then supposes that the working class man will, with his new paycheck, decide to take more time off (to ... finish that sentence), which means he becomes less productive than before. Which means the market, in fact, cannot increase its supply. I think this example is assuming full employment. But even if that isn't the case, the point is there are these restraints, limits, things the economy can't do no matter how badly you want it to. The idea is to keep such models simple so that you can see the results of these thought experiments.
Then Malthus goes on to rail about something very specific to his time (for a few pages, no less) - something about parish assistance to the poor. The point is that it creates a certain dependence (or faith, rather) of the poor on such institutions (but it comes with conditions), that they can always be counted upon to help them in case they're suddenly unemployed or they couldn't afford to feed the family with what they're earn ...