not really, the unconditionality is kind-of a requirement. Pay people to not work and you skew in favor of not working, pay people to work and you skew in favor

not really, the unconditionality is kind-of a requirement. Pay people to not work and you skew in favor of not working, pay people to work and you skew in favor of working, pay them for any other condition and, well, it's skewed, or in economic terms, distortionary. You can still have conditional benefits on top, favor working or something else a bit more if you want, but the base needs to be unconditional.