I'm going to play devil's advocate and be pedantic. Lobbying doesn't purely mean bribery. By its strict definition, lobbying means influencing. Was the civil rights movement corrupt for lobbying to allow equal rights for black Americans? They did donate and promise to elect the Democratic Party in exchange for passing the Civil Rights Act. Unions has and always lobbied as well. Environmental groups lobbied to pass stricter environmental regulations.
Lobbying has understandably gained a bad connotation, but not all lobbying have evil intentions and consequences. It ultimately depends on the context. If lobbying disproportionately empowers only a select few at the expense of others' rights, like billionaires lobbying to dilute worker's rights and environmental protection because it affects all of us, then it is unquestionably bad.