Super is a cost to the employer, period, whether it's part of your package or 'on top'.
If you increase costs to the employer, they'll either take a lower profit, or raise prices, or cut costs somewhere.
Whether an increase in super cuts into wages depends on market forces. If the labour market is tight enough, employers might cut costs elsewhere or take a lower profit. However, given that super is a direct employee cost, employers would more likely associate it with employee cost cuts via lower wage increases.
If you increase costs to the employer, they'll either take a lower profit, or raise prices, or cut costs somewhere.
Whether an increase in super cuts into wages depends on market forces. If the labour market is tight enough, employers might cut costs elsewhere or take a lower profit. However, given that super is a direct employee cost, employers would more likely associate it with employee cost cuts via lower wage increases.