People are living longer healthier lives and most people are able to work well into their 70's. Forcing people to retire at the current age causes them to use their savings and apply for government funds. This means that many people will not have enough money to cover their expenses until they die and will be forced into poverty.
The state should not ask old people to keep working beyond the current retirement age. People who have worked hard their entire lives should not have to keep working just because the economy is doing poorly. Instead, the state should find other ways to raise revenue, for example raising taxes.