That kind of sentiment is a form of
learned helplessness.
'Many forms of Government have been tried, and will be tried in this world of sin and woe. No one pretends that democracy is perfect or all-wise. Indeed it has been said that democracy is the worst form of Government except for all those other forms that have been tried from time to time.…'
Winston S Churchill, 11 November 1947
I've noticed that people who exhibit learned helplessness on one subject, often exhibit the same on another. I also think that chronic health conditions can do a great job of reinforcing this, because if we're deprived of agency over our
body, of course we feel powerless. Understanding the great degree of agency we generally still have over our minds and the way we process signals from our bodies consciously is one way to address that.
This was a study which looked at adolescents with asthma, and concluded that being asthmatic did indeed contribute to learned-helplessness behavioral correlates:
https://academic.oup.com/jpepsy/article/24/3/259/918082
As you would expect, there's a wealth of data indicating that things which generally fall into the cognitive behavioral bucket, can reduce the extent to which learned helplessness increases suffering among the chronically ill:
https://onlinelibrary.wiley.com/doi/abs/10.1002/art.1790040405
"Learned response to chronic illness" and even just "Learned response" are other good search terms for finding research into this.
That said, I also think that simple laziness and not wanting to look the unpleasantness of what's happening here in the eye, has a lot to do with some of the very false equivalencies between parties. If I have a set of votes that matter (especially at a local level), then I feel an obligation to inform myself, to be active in my community, to influence others and to show up and vote. On the other hand, if I can convince myself "both parties are the same and nothing matters" then I can just sit on my ass and feel sorry for myself and watch Netflix and wonder why my life never seems to get any better.
Saying Democrats and Republicans are the same because they both ultimately spend a lot of money on the military and don't worry much about debt is glossing over a lot of meaningful differences.
totally agree; once we deal with the current set of crisis, having an opposition party hellbent on toning down military spending in the interests of better social programs and life at home sounds like a great goal. National debt in the US is, at present, pretty far down my list of concerns for a number of reasons.