Because collecting on unpaid bills has become more difficult, debt buyers have become more cautious about what they purchase, and the price of unpaid debt portfolios has fallen.

由于催收欠款变得越来越困难，催收公司在收购债务时也变得越来越谨慎，不良欠债的市场价格也在下滑。

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Even if handled well, the difficult business of debt reduction will hold back the rich world's economies for several more years.

ECONOMIST: Debt reduction

Growing GDP will be extremely difficult because high debt levels require onerous spending cuts, which, in the short term, can cause a contraction in the private sector and a decrease in total output.

FORBES: U.S. Debt Bomb's Detonation Sped Up By Five Years

The recession has made the job of recovering rate debt more difficult.

BBC: Rates debt in Northern Ireland doubles in last five years