The majority of random people don't have combination of desire, corruption, sophistication, and political experience to pull off this kind of bribery.
Virtually every elected politician does.
~Everything about the election process selects for the worst kinds of people.
But what you could do is vote with a string attached and a penalty for being recalled that is going to make people think twice about running for office if their aim is to pull some kind of stunt. The 'you give me four years unconditionally' thing doesn't seem to work at all.
The twist on that body however is that voting is mandatory and ballots have a non of the above option on them. If a super majority (say 60-75%) vote none of the above the election is a do-over with all the people on the ballot being uneligable to run for that seat for say 5-10 years.
Then it boils down to morals, how flexible people are with them - this is weakness of character. Ability to ignore malevolent behavior if it suits me is more a ballpark of amoral sociopaths than good-hearted guy who simply doesn't have 2 hours a day to ponder philosophies of modern politics and regional historical details half around the globe. No amount of ads (which are so far trivial to avoid with reasonable lifestyle) change what a moral person considers moral.
And it couldn't have been easier this time, its not some left vs right view on things, just simple morality - lying, cheating, stealing, potential pedophilia, not hard to say of one is OK with that or not.
Sure I could eat a salad for 5$, but no I'll get a crappy burger for same amount because I like salty greasy stuff. Gee doctor why do I have bad heart, how could have I known? Must have been those evil mega corporations and their genius marketing.