Gordon Strachan has claimed that some Scottish clubs are merely playing at being professional.
The former Scotland boss believes "40 to 50%" of SPFL clubs would struggle to survive in the English leagues.
Strachan, who has also managed the likes of Celtic and Middlesbrough and is now technical director at Dundee, is unimpressed with the manner in which some Scottish clubs are run.
Speaking on the BBC's Scottish football podcast, Strachan said: "If you want to be a professional club, show it.
"Have full-time employees, have full-time players, have an academy, do the whole lot. Just don't play at being a football team and expect us to look after you.
"When you talk about clubs coming into the league, what are they bringing in? Two hundred people per week to a game, is that really professional football?
"The teams in the bottom two leagues at the moment, in general, how many players have they produced over the last 14 years?
"If you think giving a good product is watching two teams in the bottom half of the Scottish Premiership playing on a plastic pitch, you're kidding yourself. Absolutely kidding yourself.
"I just think we get over this period, see where we all are, how we all come out it. Then say, 'right, OK, who really wants to go head over heels in being professional and bringing on the game?'
"I'm sure if we do it properly, our product can be 100% better than it is right now.
"Nobody's going to kill a football club but find your level that you play at. Find the level your finances are putting you.
"Don't tell me you're a professional club when you're paying people part-time 80 quid a week and nobody turns up to your football matches."
