Those who would just sit at home would are likely not achieving anything valuable on their job already. Let’s for a moment assume laziness would not be a big problem in this scheme.

What would be a big problem is that fools and their money will be easily parted… most who are in poverty are not there because they can resist short term temptation. Instead of virtuous poor now secure in happily feeding themselves and searching for self improvement you will find poor with more ways to waste but who are still hungry for nutritious food, still short for rent, and still with poorly clothed children.

The sick will be expensive to help still and the money won’t be sufficient there either.

I like your idea it is very star trek, but wouldn’t expect it to be more than an incremental improvement for society, and one wrought with some thorny problems.

The big problem though is… what will you do if this idea encourages rapid population growth? All of a sudden do poor women start to see their apparent income double if they have a child? This is troublesome… how do you ensure parents who are irresponsible (not an insignificant number, unfortunately!) spend a child’s share on the child, and wisely?