I'm sure that people who don't like the idea will be able to opt out.
I still think that giving people a choice of where their taxes are spent (as opposed to a blanket funding of failing businesses) is an imaginative idea, and will benefit those who are less well off as well as the rich, whereas a lot of government initiatives are inclined to favour one group or the other. In the end, it doesn't matter if people buy five expensive scented candles, or put the money towards an item of furniture they really need - the money isn't a present, it is a boost to the local economy, which consists of all sorts of different ventures. If the people in the candle shop lose their jobs they will cost as much in benefits as those working in less exclusive outlets, and the human cost will also be the same.
I'm assuming that the vouchers will be valid for local businesses, so people will have different options in different areas. Maybe not, though. I'm less concerned about the fine detail than I am impressed with the fact that the money will go back to the taxpayer. It's definitely a populist move, and one that is only possible because of the historically low interest rates we have just now, but for once I approve of a Tory initiative as it (on the face of what we know so far) will benefit everyone one way or another.