All resources used in the production of goods and services are scarce. Thus, it follows that allocating resources to Project A siphons resources away from Projects B, C, D, etc. In funding welfare, the state must decide how to allocate resources in light of their scarcity.
Question for supporters of welfare: how can scarce resources be allocated among competing projects in a manner that is economically rational? For example, how can you determine which of the following represents the best use of limited capital?
1. pay welfare to Group A
2. build 100 elementary schools
3. fund expansion of fighter jet inventory
4. build a moon base
If you can answer the question correctly, there is hope for you (again, talking to supporters of welfare). Only then is it worthwhile to demonstrate the reasons welfare is unjustified and economically irrational. After all, why play chess with someone who doesn't even understand how to move a rook?
It is interesting to pose that question. But of course the "best use" for the people who spend the capital (bureaucrats) is whatever strengthens their political position and has nothing to do with what is "best" for the people who fund or benefit from the spending.