Yes, they do that now.
What about in the future? There's no guarantee that they won't start lobbying for things which entrench their monopoly and help their business while harming consumers.
Just look at Google Fiber. At one point in time it seemed they might actually disrupt incumbent providers like Comcast, but they figured it wasn't in their interests and mothballed it.
These are just what I read but I would love to hear if this was just PR and there was a sinister reason like you imply.
The truth is the exact opposite. Google got very favorable treatment from fiber cities: https://techliberation.com/2012/08/07/what-google-fiber-says.... See also: http://crosscut.com/2014/12/google-fiber-never-come-seattle-....
The difference between Mountain View and Kansas City isn’t that that Comcast has somehow managed to out-lobby Google in Google’s own back yard. That’s absurd.