On either side of the aisle it should be clear that you're giving politicians an extra lever they can use to manage the economy and prevent undesirable outcomes

On either side of the aisle it should be clear that you're giving politicians an extra lever they can use to manage the economy and prevent undesirable outcomes. Obviously we want to stimulate people's self determination and hard work. On the other hand we don't want people to fall out of the bottom of the system. With UBI in place as an extra tool, this can be tuned much better than without it. Later both sides can argue over how much it should be, and what kinds of thing still needs separate subsidies versus where government spending can be reduced. But now they have an extra policy tool to implement their wishes, whichever side of the aisle they're on. Why wouldn't one pick it up?