Older People in my country

Nowadays, because of the increase of in the average life expectancy and good life living conditions, people are living longer than before and their health is better. You can see many pensioners practising different sports, working out, strolling or enjoying new hobbies. For example, fishing, yoga, water aerobics, playing dominoes or cards and surfing on the internet are very commons activities in old age. This is fantastic!
In Spain, older people usually spend a lot of time with their family. Many men and women in their eighties or nineties are looked after by their children when their health gets worse. Unfortunately, with the current crisis situation, some of them also have to collaborate contribute to the home economics with their pensions when their children are unemployed. In On the other hand, work is a cause of many people can't being unable to take care of their parents and they have to live in Senior Centers.
It's the sad reality. But luckily, the vast majority of Spanish retirees have a pension, not enough in many cases, but they have it. I hope we can have one in the future.

Great job! My corrections are in red, and my suggestions to sound more natural are in blue/gray.

Also, you can say either:

"work is a cause of many people being unable to take care of their parents" or

"work is a reason why many people can't take care of their parents"