Buying a phone for someone so that your law gets one more vote will be very natural, so all the poor people will get new phones very soon. And that will not be a bad thing, because politician will not be able to buy votes then pass a law to take the same money back from people. In effect this will morph into a sort of UBI, where some people pay others to keep society running with laws that they think are beneficial for everyone. And people who think they know better will be able to gather in separate cities and try out the laws they think will be better.
I was proposing modifying how we interact with elected officials, not modifying how we elect them.
I realize there are bad actors actively working to suppress voters rights in many places in many ways. and I dont want to even be accidently hitched to that bandwagon.