Are you sure UBI would actually be against "conservative" interests?
With UBI, it's hard to justify salaries for much of the redistributive bureaucracy.
With UBI, it's hard to have open borders as well.
No, but the most common objection I hear to UBI is that people will just spend the money on drugs. But I have yet to actually hear anyone say that they'll start smoking crack or whatever if their rent went down a few hundred bucks a month. So either I should start hearing people admitting that they will, or else this objection should get dropped.
Yes, it's a downward redistribution without moral behavioral tests to assure that people who don't adhere to conservative values aren't getting it.
> With UBI, it's hard to justify salaries for much of the redistributive bureaucracy.
Only because it maintains anti-conservative redistribution while removing the pro-conservative limitations on that redistribution which the bureaucracy exists largely to enforce.
> With UBI, it's hard to have open borders as well.
It's hard to have the strawmanning position of “open borders” that conservatives pretend any decision from their preferred style of restriction is, but it's not actually harder to have any of the real alternative immigration policy positions that are significant contenders with those preferred by conservatives.
In fact, a basic income for citizens and LPRs whose level was tied to a dedicated funding stream that included (as well as the usual suggestions of higher taxes on capital and high-end income) additional per-entrant per-year fees for dual-intent work-allowed visas and supplemental income taxes on all non-citizen, non-LPR income would actually be a potent political lever to increase the number for a policy that, while not actually open borders, would be closer to it than many of the things they conservatives have objected to as “open borders”, with numerically unlimited work-allowed dual-intent visas, perhaps retaining H-1B style restrictions on conditions and sponsorship, but possibly also (with a higher additional fee than the H-1B style ones if those are also retained) a personal, unsponsored one that only requires the applicant not to be personally excluded from entry for criminal record, etc.