[dragonwriter]

> This is clearly the worst aspect of our system and shows that it was designed by the mathematically uneducated.

The answer is no.

> I fail to see how there won't be some kind of inflationary situation amongst the lower class

Ignoring any potentially counteracting monetary policy intervention, there absolutely will be some price inflation for goods disproportionately in demand at the low end of the economic distribution. Reasonably, you expect both market clearing price and market clearing quantity of such goods to increase with a transfer of income to that group (and UBI funded by tax is a transfer, in effect). In short, nominal net beneficiaries will get more stuff, but by somewhat less than prices before the UBI would suggest.

Essentially, production will shift from things demanded by the net contributors to things demanded by the net beneficiaries.