Given, there is a corrupting influence of undeserved money on people ... Something similar would be interesting to know (but I guess, will never be researched)

Given, there is a corrupting influence of undeserved money on people ... Something similar would be interesting to know (but I guess, will never be researched): How corrupting is the influence of state-money poured into many industries of western nations, because those states want to support their own big industries (like military industry, energy, ...) and are lobbied into doing so ... the result: Money goes on and on into the same corporations, but small companies get nothing.