That would assume there is a correlation between Alzheimer's and income. In some quick googling of studies, there appears to be. However, with often differing results from US vs. European studies (and studying different things like education instead of income and vice versa, dementia vs. Alzheimers and vice versa, urban vs. macro and vice versa), there are hints that it is an accessibility of diagnosis issue.
We still don't know enough about Alzheimer's to have a definitive bullet list of healthy habits to stave it off. Sleep, exercise, dental health, all have some weak evidence behind it. It seems that Alzheimer's is still a more equal opportunity destroyer than heart disease or many cancers where there are plenty of evidence that you can mitigate risks with lifestyle changes.
We still don't know enough about Alzheimer's to have a definitive bullet list of healthy habits to stave it off. Sleep, exercise, dental health, all have some weak evidence behind it. It seems that Alzheimer's is still a more equal opportunity destroyer than heart disease or many cancers where there are plenty of evidence that you can mitigate risks with lifestyle changes.