How Do You Save Enough Money for Retirement If You Are Going to Live Forever?

It's 2086, I've been dead for a bit They put my brain in a machine So I could still exist My bones are 1's and 0's My frame's on wheels So I can go for place to place and do what I'm told I am happy that I don't feel a thing I am happy that I don't feel a thing My children's, children's, children are growing up I didn't save enough My hard drive will be out of date and I'll be out of luck They'll put be in a bin, I'll be disposed Unwanted and forgotten But not decomposed I am happy that I don't feel a thing I am happy that I don't feel a thing I am happy that I don't feel a thing I am happy that I don't feel a thing When I die, put me in the dirt So I can feed the plants and trees And not hurt the earth I'll be happy to be contributing I'll be happy to not do a thing I'll be happy for an ending I'll be happy to not do a thing