As a quitter, the burden is on you. With paycuts, it's about how big a cut, can you prove that your pay was actually going to get cut, and by decisions what did you do to try to get the employer to change their mind about the cut.

Just try to get things in writing as much as possible. If the employer doesn't give you a memo about the paycut, save your pay stubs. You want one showing your old-higher wage, and your new one showing your new-lower wage. Send emails telling them that you don't want a paycut and hope they reply so that you have proof you tried to get your employer to change their mind. Then don't wait too long to quit because that can be used against you as in you accepted the change. So when you have the first two proofs, submit a letter of resignation not for the employer, but knowing that it's going to be sent to the UI people. Don't say "I really liked working here and my life has gone in a different direction" because you hope to get a good reference. Say "I'm not working here anymore because you cut my pay, and if you change your mind, talk to me."