The TUC research finds that the employment rates for those approaching the current SPA are low, with just 54% of men aged 60-64 and 62% of women aged 56-60 in work.
Ministers seem to think that putting up the state pension age will automatically increase working lives, yet the TUC argues that many older people are unfit or will find it hard to find work and so will end up in a new limbo zone - too young for a pension, and too old to work.
Nearly two in five of those approaching the SPA are economically inactive (defined as someone who has not sought work in the last four weeks), with long-term sickness and disability cited as the main reason for then not working.
People formerly working in skilled trades, heavy industry and low-skilled jobs are most likely to be inactive due to disability and ill-health, while managers and senior officials are far more likely to be inactive because of early retirement.
Nearly a hundred thousand more people are currently inactive due to long-term sickness and disability (470,325) than to taking early retirement (375,368).
Around a quarter of a million of all economically inactive older people actually want to work. But with nearly half of all unemployed older workers out of work for at least a year, it's no wonder so many have given up looking for jobs, says the TUC.
With nearly half a million people approaching the state pension age already unable to work due to ill-health, the TUC believes the government is wrong to raise SPA without first addressing the health inequalities that are forcing many people out of work well before they're able to draw their pension.
The TUC is also concerned that planned rises in the SPA are being accompanied by tighter controls on social security support that will force many older people to actively look for work or risk losing their benefits.
While it is vital that older unemployed workers are provided with access to high quality employment support, forcing older disabled people approaching retirement to comply with tight Jobcentre Plus requirements is a poor use of resources, the TUC warns.
Instead the TUC believes the government should focus on tackling age discrimination, extending access to flexible working and supporting those who are actively seeking work to re-enter the jobs market.
TUC General Secretary Brendan Barber said: "While more people are working past their state pension age, often as the only way to get a decent retirement income, a far greater number of older people are unable to work due to ill-health or because they are trapped in long-term unemployment.
"Accelerating the rise in the state pension age will simply push more people into poverty. We will end up with a new limbo zone for people in their mid-60s who are too young for a pension, but too old to have any realistic chance of a job. With a benefits system that gets meaner and tougher each year, even 66 year olds who have worked for decades before stopping work will be treated as work-shy scroungers.
"By raising the state pension age and ignoring persistent health inequalities, the government risks overseeing a dramatic rise in pensioner poverty."