Perhaps, but if so that should be solved directly, by creating laws limiting the leeching behaviour, not by generally disincentivising work.

I'm curious if UBI could have this effect long term. One possibility could be that as people have reduced existential pressures they begin to explore the things that actually interest them and reduce the activities they do to solely generate income. This could have two positive effects. The first is an explosion of long tail creativity and innovation. The second, a correlation of sorts, could be that people reduce their society (environment etc) harming but income generating activities.