He wants to prevent banks from using government-insured deposits to make risky investments.

VOA: special.2010.01.22

It used to be that the government didn't let banks pay more than a certain amount on their deposits and that helped protect banks because then they didn't have to compete to pay high interest rates -then be incentivized to make risky loans to try to make money with those high interest rates.

在这之前,政府不允许银行对存款,支付超过一定数量的利息,那样做是为了保护银行,因此他们不必争相,去支付高额利率...,因为在高利率支付下银行会倾向于,发放高危贷款以获取利润

耶鲁公开课 - 金融市场课程节选

Now, the government insures deposits, as you know, through the FDIC -the Federal Deposit Insurance Corporation.

现在,政府对存款进行保险,如你所知,通过FDIC,全称为联邦存款保险公司

耶鲁公开课 - 金融市场课程节选