This is a concept those on the political left do not understand or they dismiss it.
To them, government is the answer to everything.
Liberals look at the world and see "problems" or "crises".
Everyone else sees "challenges".
The former is a negative view, the latter a positive view.
The Left sees "try" the right sees "do".
The left hangs on the notion of the group. The right individualism. The Left sees individualism as selfishness and translates that into "the right is greedy and does not wish to share".
The left believes that because one person has "more" then by design another must have less.
We see this in their posts about "wealth distribution" sahre of the national income' , the so-called "wealth gap"....Those on the left are miserable people who have this undying need to know what the other person is doing, earning saving or investing. Once the other person has exceeded a certain wage or has accumulated more wealth than those on the left feel comfortable, they believe that to be unfair and somehow some way their mindset leads them to believe that something must have been taken from them. At that point those on the Left look to government to help them "take it back". Hence the concept of the "fair share of taxes paid".
It's a load of crap. However, show those on the left the numbers regarding which income levels carry the largest share of the federal and state tax burdens and they dismiss it as right wing propaganda.
It is almost as though liberal/progressives cannot be convinced that water is wet.