Cheating and corruption does happen, but the sheer logistics of throwing a T20 cricket match would make it borderline impossible, I think?

It's not like Hanse Cronje and his declaration at the fifth test against England in January 2000, there's no declarations in T20.

You'd have to have most if not all of the team be in on it, you'd have to overcome years of training so players dropped catches instead of catching them. You'd have to have multiple game plans in place ("opposition wins toss, puts cheating team into bat", "opposition wins toss, puts themselves into bat", and so on). You'd have to do all of this under the noses of experienced coaches, umpires, spectators, players, in a way that aroused few, if any, suspicions. It just seems really difficult, if not impossible, to pull off.