In the UK, probably to some lesser degree in the US, we often pay in-work benefits to those whose earned incomes fall below a certain threshold.
The rules are extremely complex due to the need to determine what is actually a low income because there is a need to be seen to treat those with higher unavoidable expenditure - such as large families, or disabled workers etc and to treat them proportionately fairly.
The problem is this, if an employer chooses to pay such low wages that most of their workers are entitled to in-work benefits, this pretty much amounts to a Government subsidy to bad employers, and this is to the detriment of both tax payers and tax paying companies who do pay adequate wages.
We have come up with the concept over here in the UK of both a minimum wage - legally enforceable and usually inadequate - especially in high cost residence areas such as London.
The next concept that is promoted and has gained some acceptance among many companies is that of the ‘living wage’. This is a semi formal agreement which is voluntary and is not legally enforceable. It is higher than the National minimum but you won’t be living it high on the hog - seems to me the level is about right to provide an incentive to workers to live tolerably but give enough incentive to develop and work harder.
There are many problems in relation to differentials, after all a highly skilled tradesperson needs to believe that all the hard work of training and learning will make a genuine difference to their income and that they would be better off than those with fewer or much lesser skills and knowledge. That’s why you have to be very careful in where you set the level of minimum wages.
but…
It really cannot be right that employers are seeking a competitive edge by paying only just enough to survive on minimum wages and leaving it up to the Nation to pick up the tab and make up the difference.
So despite all the problems, the reality is that we cannot rely on employer decency and goodwill to reward their staff adequately, the bad employer will always be undercut by a worse one, especially in a recession such as we are in - despite what our current administration would have you believe.
The problem about setting minimum wage based on company finances is way difficult, accountants make it their stock in trade to reduce company taxation liabilities, and the vast majority of it is perfectly legal. I just cannot see how you would reach into the books of a company and determine the state of finance and keep it up to date.
There is a way, but its not acceptable, because such a level of scrutiny would be a long way in the direction of a command economy,
Even though I am a strong trade unionist, I really would not want the state to have that much direct oversight - far far too dangerous, plus a costly bureaucratic nightmare - it would not allow small companies to do what they do best, which is to react quickly to market opportunities.
In short to the OP, you need to rethink how you would set a fair lower wage level, company finance inspections are not the way to do it.