Reliance Interest

The term "reliance interest" generally means an economic or legal interest in the existing legal order, as set forth in court precedents. Thus, it tends to oppose changes in that order, even if it wrongly interprets the Constitution.

Government workers and pensioners. This is the single largest group. They are recipients of government-originated revenues, and as such beneficiaries of the programs that pay them. Those can include programs like Social Security, Medicare, Medicaid, and housing and farm subsidies.

Within the above general group are military personnel, contractors, military bases, and the like.

Legal profession. The practice of law is mainly based on precedent, not on constitutional history or theory. Lawyers learn not to challenge precedent, except in extraordinary cases. This also applies to judges.

Academia. Much research is government-funded, and tends to support current doctrines of what should be done.

Congress.
Most members of Congress are perfectly aware that much of the legislation they pass is unconstitutional. They are not experts on the Constitution. They are experts on getting re-elected. If pleasing a few constituents will get them re-elected, it doesn’t matter to them. Their attitude is if the courts want to strike it down, then we can blame them. Anyway, there are not enough judges and courts to review everything they pass.

State and local government. They receive much of their funding from the U.S. government.

Black projects. These are often unfunded by Congress, and hidden under the security classification, "Top Secret: Special Access Project". Even the President doesn't control many of these, but they participate in the decisions made by other branches.

Many of these are predominantly funded by legislation advanced by the Democrat Party, and is the reason Democrats tend to oppose originalist judges.