Should the government mandate cashless welfare cards that restrict what recipients can buy?

Yes

No, it is an expensive, flawed system that disproportionately targets Indigenous Australians

No, it is a paternalistic policy that strips vulnerable people of their dignity and financial autonomy

My stance on this is mixed. While I do believe that less money should go towards alcohol, gambling and drugs. Focussing more on housing, food and such. Considering how bad the economy is those very vices help some people get through their lives without ending it all. While a lot abuse these vices I do not think limiting what they can spend is the solution but fixing the root causes as to why they have become a problem. More support and guidance for those who have addictions to such things especially for the homeless would be a good start.

Yes, but only for communities or individuals where this is approved by the community, or individuals or clinicians request it. for example, druggies will sell their soul for a hit, so they will buy food with a 'restricted to food' card and sell the food for less than its value but enough to get a hit, so simply restricting cards to food doesn't work.
Like buy a bag of spuds for $20 bucks and sell them for $10 to buy a hit. So it doens't work unless they are compliant and willing and seeking help.

Yes, it stops taxpayer money from funding gambling, alcohol, and illicit drugs

Yes, but only in specific communities battling severe substance abuse and domestic violence