The Wall Street Journal reported that the U.S. Department of Justice is investigating Medicare Advantage billing practices at UnitedHealth Group, a development that the insurer disputes.

"Ultimately, you're going to see the system collapse and an interruption of benefits," O'Malley told CNBC. "I believe you will see that within the next 30 to 90 days." He warned those who receive benefits currently to “start saving now.”

The good news for many seniors is that Social Security benefits aren't always set in stone. There are ways you can increase your benefits beyond the annual COLA, and it may be worth exploring several options that might be available to you. Here are three ways you could increase your monthly check.

Means-test Social Security, raise the retirement age, and let us invest our own money.

Two years ago, someone falsely filed for a tax refund with my Social Security number. Now anything that involves my Social Security number is locked.

The Social Security Administration is preparing to lay off at least 7,000 people from its workforce of 60,000 — and the final reduction in force number could be as high as 50%, according to two people familiar with the agency’s plans who are not authorized to speak publicly.

There’s a reason workers are often encouraged to house their retirement savings in a Roth IRA or 401(k). Not only do Roth accounts offer the benefit of tax-free investment gains and tax-free withdrawals,