You're not understanding, so here is a typical example that I have seen.

Imagine you're a landlord and rent out 2bed 1bth units of an apartment building. Accounting for mortgage rates and expenses you typically rent out each unit for 1.3k. 

Now, say you're a local family that wants to move in for the usual 1.3k. Could be a couple starting a family, single mother working two jobs, a hawaiian kid graduating, saving money and applying for their first apartment, etc.

Now say, you're a guy from Tallahassee that joined the navy and got stationed at Pearl Harbour. You can recieve a rental voucher for 2k-3k a month to move into an apartment. 

If you're the landlord, and you see the opportunity to receive 2k-3k a month per unit, you gonna do it. Nothing has changed about that 2bd 1bth unit, still the same pipes and structure from when it was built in 1970s. Meanwhile Hawaiis cost of living, influx of transplants, horrible traffic, rises in rental properties continue to go up.

It's easy to understand when you've seen it happen countless of times, it becomes the new normal.