Is it feasible to increase your productivity by 30% a year for 60 years?
lsc: well, you need to measure productivity.  One way to measure it is income.  I've had close to 30% or so on average if you say I started working at 15 for $4/hr, and I'm 29 now;   I can get $150/hr for some short-term work that is within my core skillset.  Of course, I'm about half that for longer-term work.  still, if you only count my 'long term' work rate, I've got 15%, and I imagine it's not that difficult to be twice as good at improving as I am.Now, most of my efforts are focused on my business... from here,  it's quite possible that I will have another few 'good years' where my income shoots up a lot.  (the last 100% year I remember was when I got my first programmer/SysAdmin gig at 17.)So yeah, I think 30% is possible.   I think it's going to be hard, and would require an exceptional person, but I think it's possible.