There is a significant body of economists who are skeptical about the benefits a minimum wage brings to an economy, let alone real increases in it. However the US, Germany and the UK governments have recently signalled that they are in favour of minimum wage increases. Below is some interesting reading as you will discover it is not the relatively poor who may benefit from increases in the minimum wage rate.
Buffer stock schemes employ a minimum price for agricultural produce to guarantee a stable supply of food stuffs and a minimum income for farmers, and thus aid planning. The scheme is a mixed bag of success and failure and has some great chains of analysis and evaluation points for you to sink your teeth into.