Gadolhatorah: Without subsidies (in the form of price supports, though government purchases of unneeded crops or paying farmers not to grow certain crops), prices would be much lower, meaning marginal (and inefficient) farmers would change occupations, and consumers would pay lower prices. Corporate welfare paid to producers of carbon-based fuels is probably a reason why electric vehicles had problems in the past.
While a strong argument can be made for the government paying money to the poor (the modern equivalent of tsadakah, though the government seems to cherish humiliating the poor and impairing their ability to rise out of poverty), various forms of subsidies are just welfare for the undeserving rich, which hurt the bulk of society. Better for the government to stay out of the economy, and let free markets decide what is most efficient.