Phillips curve that shows relationship between inflation and unemployment (higher unemployment is deflationary) gets quoted often yet it doesn't take unemployment benefits / UBI in account. The deflationary effect seems to be predicated upon the unemployed not having income. Government numbers of unemployment may not be relevant when benefits give income equivalent to employment. 

For practical purposes people  on benefits can be considered as minimum wage government employees digging and filling the same hole again and again not leading to any productive outcome.

I'm probably too late in realizing this but there seems to be a need for a corrected Phillips curve or a better and more comprehensive measure.