Hmmm.... Money talks!
A) A vaccine gets pushed through and approved (Operation Warp Speed) and hits the market. Certain entities make tons of money off this venture. Then it is mandated for certain individuals so now the cash flow is guaranteed for a while anyway. Trouble is, vaccine should not have been approved that quick(Operation WARP SPEED). People dying from complications of the vaccine itself and who knows the issues forthcoming 10,20,30 years down the road.
B) A tax credit gets pushed through to capture carbon and sequester it under ground. Again, tons of money to be made off this little venture. A venture that is not proven to work or even proven to decrease carbon enough to make a big difference. But, CO2 has been proven to be lethal and dangerous under pressure in a pipeline. Not mandated, but, even so, PRIVATE companies along with state Governors and congressmen/women are following the money and trying to push this bogus of an idea through by even using "Eminent Domain For Private Gain" to bury this Co2 pipeline (Pipe Bomb) through unwilling land owners ground.
Both cases.... Money!
A)No vaccine= No vaccine to mandate! 
B)No tax credits= Not financially viable and No Co2 Pipelines to shove down peoples throat

BOTH parties guilty as hell of chasing the $$$$$ and the hell with future outcomes of  "We the People"