How long have you been supporting us for? A few names to jog your memory Barry (not Bannan, I won't get you started on him), Milner, Young, Downing. They left for bigger clubs who could offer a better chance of success. In the short term, we have no chance of competing with these teams.
Even if we made Andi our top earner, if any of the big four came calling, he would leave. That's modern football. For these reasons Paying him £20k, £30k or £40k will make no difference.
Alternatively, adopt your strategy and pay him more than he's worth. Andi thinks he's made it and stops putting the hard work in. We're left with a player on big money that we can't offload. Another Ireland, Warnock, Dunne etc