Almost all Lobbying is not bribery. Lobbying means using your resources to influence politicians by campaigning and meeting up with them. But there is no direct exchange of money, which would be bribery. Actually lobbying can be a useful part of the democratic process and it can also be done by civil rights organizations or environmental organizations that are non-profit.
I know it can be comforting to simply say "all those politicians are corrupt" but doing so will only help those who are actually corrupt.
I personally know lobbyists and this is simply not what's happening, at least not in my home country in Europe. Lobbyists will mainly explain the industries standpoint towards new parliamentary initiatives and how it will impact them.
But in my home country those accusations in the article would definitely be one of the biggest political scandals of the year while in the US it's apparently not very noteworthy at all. So maybe I'm simply missing the US perspective on this.
Lobbying seems to be done in Mar-a-Lago these days ( US), the president is easily bought. Eg. A QAnon member seems to have donated 1 million to the Trump campaign.
Without checks in place of course, unlike in Europe.
I know it can be comforting to simply say "all those politicians are corrupt" but doing so will only help those who are actually corrupt.