Personally, if my employer feels I need access to email or to be reached 24/7, it is their responsibility to provide the means for that. They do not have the right to takeover my personal property or data just because I work there. Put differently, if there is a business reason for them needing me to receive emails/texts/calls outside of normal working hours, then they should provide a business solution. If I want to do it for my own convenience on my own device, well, then I would have to weigh the convenience against all the privacy issues involved.
This. I just tried to argue this same point where I work; I work in an IT group that has a rotating 24x7 on call. We had employer-issued Blackberries, which both received SMS messages and could connect to email. Since we had had them for a while, the SMS alerts over time had evolved to "X has failed. Check your email for details." Then the company forced us to turn in our Blackberries and went to a BYOD. I tried, unsuccessfully, to argue your point. I get spotty coverage on my personal phone, and none in the building, so that would rule out my personal device. Plus I refuse to allow the company control of my device, stipend or no. The alternative was to accept a "penny phone" (a Samsung Chronos 2). I was very clear with my boss and boss' boss what that could mean for response to pages. So far, nothing has come up, but I also am kind of heistant to stray far from home when I am on call.
There. Fixed it for you.
But on a more serious note, it takes a large sum of cash to run for office these days. To garner enough to run for office, one either needs to be independently wealthy, or spend all of one's time raising donations rather than campaigning.