The biggest problem here is finding secure and reliable income in the long term. People here in the 1960s, for instance, could save up quite a lot of money. This is of course possible today too, but what if you can only find low income jobs? You'll remain working poor for the rest of your life. That's not exactly fair from an inter-generational point of view. Meanwhile the number of superrich is growing. That's also unfair. And money buys legislation, so (many, but not all) democracies are broken.