[WalterBright]

Trap is when it is too expensive to leave, so they put up with a lower quality of life, such as not being near their jobs.

[aurareturn]

If it's too expensive to leave, it's too expensive for someone else to move in too.

[WalterBright]

Peoples' circumstances are all different.

[aurareturn]

I would never describe someone as "trapped" for paying below market rate in rent.