the economy grinds to a halt as incentive goes out the window?
Oh, is this in addition to any other income they earn? In which case inflation sky-rockets.
Maybe that's a tad unfair; best wait for an economist to turn up
Neither of those things happen. First of all, it replaces current welfare programs. This both offsets most of the cost, and has the advantage of improving the welfare system as a whole. But at $10k, it's not that big of a change from what welfare already costs. Of course, program design matters. For example, how are children handled? How are medical costs handled? How is the Social Security system handled? Is there a cutoff or phase out above a certain income? All of these things effect the final cost of the program.
Second, what would be the effect on workers? This is a subject people also get wrong. And they get it wrong because of the fundamentally conservative anti-welfare viewpoint which has always been with us, and has always been wrong. And that viewpoint is one which considers poverty to be a personal moral failure. In effect, blame the poor for being poor, and absolve yourself of responsibility for it. People have done this since the dawn of time to excuse turning their backs on their fellow man. But the reality is that if people believe that they can better their own situation through their own work, then they will. But you have to have 2 things in place before they will: They have to have an actual opportunity to better themselves, and they have to actually
believe that they have an actual opportunity to better themselves. No matter how much you want to blame the poor for being poor, the reality is that in economy we have in the US, it is an absolute impossibility for all people to be able to better themselves through their own work. And because they know this, many people are discouraged from trying.
A basic income removes a lot of the disincentive to trying. While at the same time provides a safety net for those who still do not have actual possibilities of bettering themselves through their own work.
But with a basic income, any and all work a person does is an improvement in their condition. It is a real monetary incentive to work. You don't get fewer people offering less work. One thing you do get, fewer people will offer their work
for the scummiest, most degrading, and worst conditions of work! That is, with a basic income, the McJobs will have to improve their working conditions to attract workers. No more treating minimum wage workers like disposable diapers. They'll just leave, and be harder and harder to replace. But, for any job where the working conditions are decent, more people will be offering more work than they do under the current system. And that is because people respond to incentives. And the incentive is to work and live a better life.
Don't fall into the trap of thinking that the poor respond to incentives differently from the rich. That's a core precept of conservative political-economic mindset. Always has been. And it has always been wrong.
As to inflation, that's a bogus strawman objection that has no existence outside of ignorance and fear-mongering. We aren't talking about spending more as a nation. We're only talking about spending what we already spend somewhat differently.