The show producer selects what songs are available for voting.

As for the "bribery"... well, they found a no-name wedding singer of dubious reputation claiming that. Unless one is firmy behind the party, pretty much haven't heard anyone believing that line.

It's why they switched to classic "he was State Security informant" or "we're removing (post-)commies" (remember, in PiS newspeak "post-communist" covers "anyone who is against PiS" and is supposed to imply that they are actually communist. Fuck logic.)