[dragonwriter]

> At least if they implement UBI then the need to build the wall on the border will increase.

No, a border wall will remain an ineffective boondoggle that serves only vanity even with a UBI.

> You cant give away money for free and NOT have strong borders.

First, a UBI is defined as lacking means or behavior testing, that doesn't mean that the universe of recipients isn't either just adult citizens or adults who are either citizens or lawful permanent residents. The higher UBI with either of those recipient pools, the less economically attractive illegal immigration is, especially if UBI replaces or reduces (say, by $1/hr for every $2000/yr of UBI) minimum wage, thereby reducing the attractiveness of under the table sub-minimum wage labor.

Second, even if UBI wasn't a tool for stronger borders and did make illegal immigration more attractive, it wouldn't magically change the fact that the border wall isn't a tool for strong borders.