Insufficient info to draw any conclusions.

You need to know how much they are taking from the $300,000 per month or per year to live on.

And what their monthly expenses are. And what their age is, and othehr assets such as a home, other property, pension or other income.

Without that, you can make up any scenario.

If the money will be 'gone' in 8 years, it would seem that they are taking too much out. Without the details, no one else could suggest anything else.

t.