If influence is so valuable, why haven't the rates been bid up? Are companies price-fixing to keep lobbying costs low? Given that a number of industries are dia

If influence is so valuable, why haven't the rates been bid up? Are companies price-fixing to keep lobbying costs low? Given that a number of industries are diametrically opposed, why would they collude? If the price is so low, why are wealthy industries like tech companies so ineffective at buying influence?