The Great Recession spared no one, but it fell especially hard on millennials. They suffered the highest unemployment rates, which academic evidence shows this will permanently reduce their wages. In the meantime, student debt has skyrocketed to record levels. The result: Their greatest financial hardship may come decades from now, when they retire.

Merrill Lynch released a report Wednesday intended to highlight the positive motivations for Americans working in retirement. The study found that 78 percent of pre-retirees above the age of 50 intend to work after they retire. Many are driven by reasons other than money. If these Boomers—and future generations—want to work in retirement, maybe the feared retirement crisis won’t materialize. But the report also provides a glimpse into the retirement expectations of successive generations, showing that the retirement crisis is still a major threat: Millennials are unprepared for retirement and they are counting on income sources that are unlikely to materialize.

Merrill Lynch asked members of the past four generations (Silent, X, baby boomers, and millennials) about their expected sources of retirement income. Each successive generation expects to depend less on Social Security and employer-provided pensions. Boomers, for instance, expect Social Security and employer-sponsored pensions to make up 60 percent of their retirement income. For millennials, it’s only 28 percent:

In turn, millennials expect employment income and personal savings to make up 58 percent of their retirement income, compared to 35 percent for boomers and 20 percent for those in the Silent Generation. The Merrill Lynch report notes that life expectancy has increased significantly over the past few decades, rising from 75 years in 1990 to 78 in 2010. If people are living longer, conservatives often argue, then the retirement age should rise as well. But those gains have accrued entirely for the rich. Life expectancy for the bottom 50 percent of households has barely changed since 1977:

In other words, those who will have personal savings to fund their retirement are living longer, but those who won’t have savings are not. Merrill Lynch did not break down their report by income level so we don’t know how much low-income millennials intend to rely on employment income and personal savings in retirement. But since the entire millennial generation expects to depend heavily on employment income and personal savings, it’s likely that low-income millennials intend to do so as well.