For now, the Danish can retire with their public pension at 67, but that threshold will gradually climb to 70 by 2040.

Denmark is pushing retirement age to 70 by 2040, igniting fears about America's Social Security future. Tim McGraw forced to withdraw from upcoming concert over health issue ...

Answer: A large-enough retirement account could affect their Medicare premiums for up to 10 years, not just one.

The Government is required by law to review the state pension age periodically. But the last two reports recommended speeding up increases - then went ignored.

Denmark is increasing its retirement age to 70, a move that will require younger individuals to work longer. Some proposals have called for the U.S. to raise the age threshold for Social Security.