The Collaborative International Dictionary of English v.0.48:

Wherewithal \Where`with*al"\, adv. & n.
   Wherewith. "Wherewithal shall we be clothed?" --Matt. vi. 31.
   [1913 Webster]

         Wherewithal shall a young man cleanse his way? --Ps.
                                                  cxix. 9.
   [1913 Webster]

         [The builders of Babel], still with vain design,
         New Babels, had they wherewithal, would build.
                                                  --Milton.
   [1913 Webster]

WordNet (r) 3.0 (2006):

wherewithal
    n 1: the necessary means (especially financial means)

Moby Thesaurus II by Grady Ward, 1.0:

78 Moby Thesaurus words for "wherewithal":
   Swiss bank account, ability, and pence, assets, balance,
   bank account, bottom dollar, budget, capacity, capital, cash,
   cash reserves, checking account, circulating medium, coinage,
   coined liberty, cold cash, command of money, currency, devices,
   disposable resources, dollars, emergency money, exchequer,
   filthy lucre, finances, fractional currency, fund, funds, gold,
   hard cash, hard currency, kitty, legal tender, life savings, lucre,
   mammon, managed currency, means, medium of exchange, method,
   mintage, money, moneys, necessity money, nest egg,
   pecuniary resources, pelf, pocket, pool, postage currency,
   postal currency, pounds, power, purse, recourses, reserves,
   resorts, resources, savings, savings account, scrip, shillings,
   silver, soft currency, specie, sterling, stock, substance, supply,
   the almighty dollar, the wherewith, the wherewithal, treasure,
   unregistered bank account, ways, ways and means, wherewith