Not necessarily. If you have set yourself up with a well-planned budget, use credit wisely, and take care of needs first, wants as you can budget for them, you’ll be fine.
I spent the first 5 years of my career in the Med in Spain and Italy. My parents had taught me how to budget in a disciplined fashion, along with basic personal financial management. I also had the benefit of getting myself through college on full scholarships and multiple part-time jobs, graduating with no debt. I lived in nice places, invested the max amount in my IRA every year, other mutual funds, savings, an emergency fund, no rolled-over credit card debt (ever). I planned “wants” very carefully. Travel was my first priority, and I took advantage of military discounts, group travel, Armed Forces Recreation Centers, traveling in off-peak seasons. I expanded my cooking skills and didn’t waste money there, staying within my monthly “fun allowance” in my budget. No money was going out of pocket for medical and dental care, unlike a civilian career. My civilian clothes were lightly worn, because I was in uniform most of the time. I learned Spanish and Italian, and shopped like the locals, bargaining for “un sconto” on leather shoes and bags. I went to the Auto Hobby shop on base and learned how to change my own oil, rotate tires, etc. I washed and detailed my own car.
I was young, so taking the overnight ferry to Malta, I sat up in the second class seating area and napped, rather than booking a roommette with a bunk. Ditto the night train to Madrid. Or Barcelona. Or Corfu ferry. European trains are great. Overnight you can go pretty far. There is also free Space A (available) on military hops. I hopped all over the Med, to the Azores, UK, Germany, Greece, Norway, Iceland, even home to the US East Coast.
My apartment in Naples had a view of the Bay and a big terrace. Fifth floor, no elevator, but my legs were in great shape.
Your pay takes a regular jump every two years, bigger jumps at promotion points. BAH goes up at every promotion point. If you build good personal financial habits now, your quality of life can be very good. There is COLA for OCONUS assignments. Cost of Living Allowance. All “allowances” are not taxable, so no bites taken by Uncle Sam.
Google Mint as a phone-based budget tool.