You don't understand how shares work. Shareholders can only benefit from shares in two ways: through speculation about the share price or through dividends. I'm kind of disappointed that I'd have to explain to a man of your stature that money that Apple parks abroad will not benefit the shareholders except in the most indirect ways.
If Apple brought home their overseas funds then it would benefit the US and Apple shareholders in general in two ways:
The taxes paid would go towards infrastructure, education, health care and other items that benefit all people in our society, and by extension also to us shareholders.
Money left over could be used to pay dividends to shareholders or to do tech acquisitions or long term investments in Apple projects which would benefit the shareholders in a more direct fashion.
Having money parked abroad waiting for a tax amnesty that may never happen does not have these positive effects and essentially ties up a lot of Apple capital in ways that are not beneficial to anybody except for the banks that get to lend this money out at prime rates while not paying Apple much of anything.
best regards