When it's hard to make your next meal, even armoured clothing is beyond your reach...
Whereas Runners will blow through enough money to pay for a couple months of a nice, cushy Middle lifestyle, the kind of luxury that these Gangers only dream of, and call it cheap because they're used to thinking in terms of 1,000¥ increments and make the readies to back up that thinking.
Not to mention all the money blown on NovaCoke snorted off of strippers. 
I think that's covered under your "Entertainment" category. Just gotta get it at High.
