When I look at the power structures of the modern world and the control that corporations have over our governments, I don't extrapolate positive changes should the powerful also start living forever.
Death is part of life. People need to stop pretending it's bad. If you feel it is such a bad thing, will you also cure death for every spider, every frog, every crow, every ant, every tree? What do you think will happen then? Or is life only important when it's a human?
The economy doesn't work that way. You and your children are not poorer because Warren Buffett is rich.
Death is part of life.
So are Alzheimer's, cancer, polio, and people with bad vision being eaten by bears. Which of those should we not address?
I think all of those problems are worth addressing, but I don't think we should be in a mad rush to cure death itself. It is a vital part of returning resources to the cycle of life to be used anew. I think our world would be worse off if humans lived forever, it would be stale and stagnant. Finally, I think we should fix some other problems that our overpopulation and thirst for growth are causing before we try to cement that growth with eternal life.
Things come and go all the time. I try not to cling to them. "This too shall pass" can be a very comforting mantra. Value things while they're around and know they won't always be around.
The sooner you get this into your head and heart, the better you will live.