I still don't see how UBI doesn't cause inflation enough to offset any benefit(in the near term ie before robot job apocalypses).
This isn't even a bad thing from an economic standpoint. Capitalism has the problem where wealth tends to accumulate upward naturally (rich get richer just because they're rich and have a bit of financial sense) and eventually starves itself of demand. Re-injecting cash in the low end keeps the economy moving despite this natural tendency. UBI has the advantage of low administrative overhead too, so more of the money gets used on goods and services. Also, unlike Welfare there is no perceived disincentive to work.
That said, UBI has its problems. Prices at the low end are likely to go up simply due to lack of workers. If you have UBI why would you do backbreaking manual labor all day for minimum wage? To really work well it has to be paired with increasing automation of low end jobs to offset the labor imbalance, otherwise you end up with inflation as people are forced to pay higher wages to fruit pickers, fry cooks, etc... in a competitive job market. Or more likely, those jobs will move overseas at an increased rate to countries where the labor market is skewed towards employers and they can pay people well below the value they generate.
If UBI does indeed raise wages at the low end, it's because people have more options in life and made their own choices. Seems like a good thing, no?
More generally, inflation is usually a bad thing, except in the labor market where it's a good thing. If wages go up and the overall price level doesn't go up as much, that means people are earning more without their expenses going up as much.
Certainly there will be price adjustments: the prices of some things will go up while others will go down. But that definitely wont "offset any benefit".
Is it? The US monetary base has more than tripled since 2008 but inflation since then is only 14.6%.
For comparison between 1999 and 2008, the us monetary base increased by about a third and inflation between those years was around 29%.
Otherwise the rich are investing less and the poor are spending more on consumption. asset prices go down cpi goes up.
I can see a situation where necessities increase in price, leaving low income household in the same position they have now.
You try to increase prices, you are out of business which is eaten by competitors.
If wages go up due to people having more and better choices in life, isn't that a win?