Earlier quoted context omitted.
> The primary subsidy afforded to farmers is effectively assistance in paying insurance premiums. But the vast majority of the subsidy goes not to small individual farmers, who might need such insurance (although even on the assumption that they do, private sector insurance companies and speculators could provide it more efficiently than the government does), but to large agribusinesses who have more than enough reso…
> But the vast majority of the subsidy goes not to small individual farmers, who might need such insurance You are quite right that there is no preferential treatment for smaller farmers. It is simply for each dollar in premiums required, 60¢ is paid for by the farmer, 40¢ is paid by the government. It is true that those who pay the most in premiums (i.e. the largest farms) will receive the most in subsidies. It is d…
I have no idea where you are getting this from. There are no actual "premiums". There is no actual insurance involved. The "insurance" is, as you originally said, "effective"--for certain crops, if their market price is below a certain price set by the government, the government pays farmers the difference as a subsidy. But only for certain crops, and those crops (the biggest one is corn) are mostly grown by large agribusinesses, not small farms. (The corn subsidy is even worse because much of the corn produced doesn't get eaten, it gets turned into ethanol to put in gasoline, for no good reason.)
> small farmers have off-farm jobs
I don't know which small farmers you are talking about. Most small farms are family owned businesses and provide the entire income for the family members who participate. Family members who have off-farm jobs are the ones who have left the farm and switched to other careers.
> Private insurance has done well to serve individual events like a house fire or automobile accident, but when things happen on a grand scale like a major flood or widespread fire, it seems they fall back to government bailouts.
First, while that may be true, it doesn't mean the government provides the insurance more efficiently.
Second, private insurance companies are often restricted by the government in the premiums they can charge. For example, while flood insurance in regions which flood frequently is not cheap, it is cheaper than it would be in a free market, because in a free market the premiums would be based solely on actuarial data on the frequency of flooding and the expected losses from flooding, which would go up as more things of value were built in such areas. But the government, due to political pressure, doesn't allow the premiums to get that high, which means that people who choose to live in such areas, or companies that choose to build infrastructure there, don't see the full costs involved and so have less incentive to find somewhere else to go.
> I am not seeing how large businesses are advantaged by the subsidy in a way that small business are not
They are advantaged by being able to lobby to have the subsidies go to crops that they can more easily grow. But they are further advantaged by the mere existence of the subsidies, since they don't need them while smaller farms might.