In the case of Commissioner of Internal Revenue v. Stidger et ux., 1966, the Supreme Court ruled on a dispute over income tax deductions. The respondents, Mr. and Mrs. Stidger, had claimed a deduction for expenses related to their son's education at Dartmouth College under Section 162(a) of the Internal Revenue Code which allows deductions for ordinary and necessary business expenses incurred during taxable year in carrying on any trade or business activity. They argued that this expense was necessary as it maintained their social standing and goodwill within their community which indirectly benefited Mr.Stidger’s insurance business by attracting potential clients. The IRS disagreed with this interpretation and denied the deduction leading to an appeal from the taxpayers.The Tax Court sided with them but upon further appeal by IRS,the decision was reversed by Second Circuit court stating that such personal living expenditures are not deductible even if they incidentally benefit taxpayer's business. The Supreme Court affirmed this decision holding that there must be a direct connection between expenditure & production/income collection process rather than just incidental benefits arising out from maintaining one's reputation/social standing in society.This ruling established clear boundaries regarding what can/cannot be considered as 'ordinary/necessary' business expense under IRC §162(a).

In the dissenting opinion for the case Commissioner of Internal Revenue v. Stidger et ux., it was argued that a taxpayer should not be allowed to deduct expenses incurred in earning tax-exempt income from his taxable income. The dissenting justices believed this interpretation contradicted the intent of Congress when they enacted Section 265(1) of the Internal Revenue Code, which prohibits such deductions. They contended that allowing these deductions would create an unfair advantage for those who earn tax-exempt income over taxpayers who only have taxable earnings, as it effectively allows them to double-dip by avoiding taxes on both their earned and spent money. Furthermore, they pointed out inconsistencies in how similar situations were treated under current law and expressed concern about potential abuses if this ruling were upheld.