To be fair, systematic data on experimental transfer programmes aimed at the extreme poor in developing countries is no better than random anecdotes for confirming or debunking stereotypes of lazy welfare recipients in developed countries with well-established welfare states. This study tells you a fair bit about extreme poverty relief schemes and precisely nothing about how the welfare state affects or doesn't affect people's behaviour in Western Europe and the USA.

Lack of negative behavioural effect from conditional handouts as low as $4 per household per month really doesn't tell you much about the effect of subsidies designed to permit an at least borderline-adequate Western standard of living.

They're trying to fix different issues with different sized budgets.

I don't think he's suggested anything of the sort; tried to discredit the study, yes, but he hasn't characterised his anecdote as a "study" much less an authoritative one.