Former St Kilda coach Grant Thomas believes the Saints' place in the AFL competition is under threat.

Speaking on SEN SA Breakfast on Wednesday morning, Thomas explained if things stayed the way they were, St Kilda was one of the clubs in the firing line.

"I don't think Melbourne can continually sustain 10 clubs forever, and I think Tasmania absolutely deserves to have an AFL football team," Thomas said.

"I'm sure there's going to be further expansion around the country, as well, and that's only going to put pressure on the lowly-performing AFL teams that continue to invent ways to stuff things up, which St Kilda's quite clearly in that category at the moment."

Thomas was adamant that St Kilda was being held back by its decision making.

"If you did a straw poll on which club tends to make the most outrageous mistakes, I think St Kilda would be regarded by most to be top of the tree," Thomas said.

"We make some really good decisions in amongst it, but we make some really poor ones.

"I was a part of some myself, I'm not abstaining myself from anything, I just think that as a club we haven't grown up in that regard and that's why we've won one premiership by one point in 150 years.

Thomas is still left unsure about the controversial appointments of Simon Lethlean and Graeme Allen as administrators of the club.

"You always give someone a second chance, but I find it really interesting how the whole thing panned out," Thomas claimed.

"Two of the people that are seemingly in the most control at St Kilda have had some quite serious allegations leveled against them at AFL and then (have) been booted out of there or had been suspended or whatever and now they're running (the) St Kilda Footy Club.

"On one side of the coin you can say 'we're getting what we should expect', on the other side of the coin you've got to say, 'give them a chance and see how they go'.

"The jury's still out and we'll wait and see."