There have certainly been times in our history, even in the recent past, in which the country at large (US) has voted for a Keynesian monetary policy. Isn't it possible, even likely, that at some time in the future a majority of miners would simply implement software changes to increase the amount of bitcoins generated? The incentive to do so is rather large, is it not? Thoughts?
This is a good question, but not only miners would have to accept the change but all full nodes too. In other words you would have to convince everybody using bitcoin (miners and fully validating nodes) to change. That's not an easy task. People that understand Bitcoin's 21 million limit understand it makes coins more valuable than keeping inflationary printing. People would be voting to decrease their own net worth.
There was another coin that tried higher inflation rate. I can't remember the name, but basically the longer you held it the more value it lost, which was to encourage people to spend/use the coins. The theory was the higher transaction activity would create more economic value and the coins would be worth more. I don't think that coin is still around.