This study has a good graph showing how people in high deductible health plans forego or delay care. It also notes that the incidence of foregoing and delaying care goes up as the poverty of the individual increases. Conclusion: HDHP’s are making access to care even more challenging for the poor. I would like to see how the Affordable Health Care act plans to remedy this.
The downside of high deductible health plans | The Incidental Economist.
Kmareka.com 
For the working poor, time is money. Just getting time to go to the doctor is a challenge, a high deductible is a disincentive to primary care.