the government doesn't go around enforcing contracts; the government provides a mechanism whereby a person who is wronged (by another party breaking their contr

the government doesn't go around enforcing contracts; the government provides a mechanism whereby a person who is wronged (by another party breaking their contract) can appeal and get some justice (without which you have the aggrieved party going over and shooting the other party). a competing company could open a store there anyway and then fight the battle in court; they might even win, but the cost of the court case would prevent most companies from even trying, after all groceries are a relatively low margin business--if this were a gold mine instead of grocery store you can be sure someone would have opened it already and fought it in court