Another thing to keep in mind is that BIG would be basic, and living on it would not be particularly luxurious. Unless you did things to supplement the basic in

Another thing to keep in mind is that BIG would be basic, and living on it would not be particularly luxurious. Unless you did things to supplement the basic income then you probably wouldn't be able to afford to buy or run a vehicle, go on foreign holidays, have the latest fancyphone or anything of that sort. So financial incentives would still exist for most people.