Aliens and dead people vote

The research group Just Facts has released a study at postelection polling from the 2008 elections that put Obama in the White House. The data has led to the conclusion that the number of noncitizens voting illegally in U.S. elections is far greater than previous estimates. The new number is 5.7 million illegal aliens voted based upon data from an extensive Harvard/YouGov study that every two years questions a sample size of tens of thousands of voters.
This raises the simple question that if we can buy online with secure access from Amazon, then why can we not vote online over the course of one week using our Social Security number? The right to vote should attach to one who pays taxes only. That would eliminate the illegal aliens who earn cash under the table, one of the real reasons behind eliminating cash.
We can log-in, every Social Security number that pays taxes and/or is retired receiving SS benefits, gets one vote. This will also eliminate the dead people who voted exceeded the population in Detroit during the last election. Chicago has been notorious for decades where dead people vote.