Quite true, singveld.
Some of my regular friends who were posted to Peace Vanguard (Apache helicopter detachment) & Peace Prairie (CH-47 Chinook helicopter detachment) didn't really get to save their allowances, and some even dip deeper into their monthly salary and even borrow $$$ from those single regulars.
Their cars must be 2L and above, preferable japanese or european models. Those who brought their spouse along, spend $$$ as if they are WAGs, buying luxuries goods and stuff for the kids, men visiting strip bars spending USD 200-300, gambling in LV during weekends.
You will be shocked to see some of these guys' living apartments, some even bigger and classier than their detachment CO, DY CO or S3.