Mitigation strategies become more expensive as "we" delay efforts to develop and apply those strategies.
There is now a huge separation of interests between those control access to concentrated capital from those whose lives are most directly affected by environmental conditions.
The "capitalists" have a strong interest in preserving their existing revenue streams. The interests of the rest of society are irrelevant. The truly poor in other countries, many of whom live in low lying areas and depend on water supplies that are already turning brackish due to the current rise of only a few inches. Such people have almost negative value to high-concentration capital operators, usually being in the way when one investment or another involves their displacement.
The Koch brothers and their friends the major fossil fuel industries have a strong interest in their current business model, and will fuck the rest of the world if necessary to prevent losses in their investments.
The delays that the Heartland Institute, and other thinktanks advocate WILL cause mitigation strategies to become prohibitively expensive and count on it coming out of our asses. The longer we wait, the more painful the movement will be.
To those who are skeptical of government intervention, I hesitantly agree, for two reasons: 1) It's been bought off by highly concentrated capitalists expressing their "free speech rights" drowning out all others in the public square, 2) Too many people have a problem with learned helplessness and are unwilling or unable to see the effects of the endless talk of "freedom", failing to see that "freedom" usually means "free to fuck over those that do not have the countervailing power to prevent it".
The place where I flat out disagree with that logic is that the people who pull the strings of highly concentrated capital are *far* worse. My preference for "government" intervention is precisely because in a society that has not entirely lost its capacity for small-D democratic action, government is weakened by the constant re-election of legislators & "leaders". Throw away that feedback loop by *endlessly* whining about "government" with the effect of ceding control to the few lever-pullers, and you will have something way more interesting.
P.S. I am a white guy in my mid-fifties who has been working in corporate environments large and small for 35+ years. I have seen the effects of narrow interests screwing over the others for most of those years. When authority is not balanced by strong accountability WITH TEETH, that authority is misused one hundred-point-zero percent of the time. Those with insufficiently accountable authority have an absolutely perfect record of misusing it.