I finished this game today and, by reading the messages here on this forum, I was able to tie up a lot of loose ends together.
The only question I have remaining is, what is the debt that DeWitt needs "wiped away?" My guess is that it is from all his gambling, but I was not quite certain.
I was wondering if Booker only perceived their message as regarding his gambling debt, but the Luteces were actually looking at the bigger picture regarding his actions as Comstock. Crushing the workers basic human rights, using religion to control others, the corruption of Elizabrth and her eventual assault on New York City
So "wiping away the debt" could be construed as Booker being redeemed by making sure none of those atrocities ever happened.
Good point. Was the memory of debt planted in his head? For that matter if there ever even was a debt; who's to say which universe's Booker do they belong to?
I got the impression the gambling debt was real enough. Caused by Booker's inability to cope with the death of Anna's / Elizabeth's mother.
Now could the Leuteces have manipulated him INTO gambling, to give him an incentive to do what they needed to get done? THAT might be possible. Sort of a Machiavellian approach. The ends justify the means. Achieving a greater good ruthlessly.
For all we know, the dead body in the lighthouse could have been one of those hundred-something Booker's that failed. Or even the one that died as a freedom fighter. Just to give Booker more incentive. Booker however simply perceived the situation as some random dead body left by gangsters as a threat, and not the Leuteces painting a bigger picture.
I wondered the same thing about the body in the beginning. I just finished a 2nd play through and found a few more Vox's that shed more light on why Booker seeks redemption after his Pinkerton days. Very enjoyable story, probably even more on a repeat.