That's not particularly typical.If you need to roll ten on your skill checks (so pretty average difficulty)
At 1st level, a good skill bonus is +8 (+3 stat, +5 training). And medium difficulty at 1st level is DC 12 (Rules Compendium, p 26). Even with a poor stat, training will be +5 which makes 7 or 8 the number of success.
At 30th level, a good skill bonus is +34 (+8 stat, +5 training, +6 sundries from character build and items, +15 level). And medium difficulty is DC 32. Even with a poor stat (+0 or +1 at that level), that's 12 less sundries for a medium DC, and if the player wants to succeed on those skill checks they will acquire those sundries.
That's before we get to resource use, which is relevant even at 1st level but of course far more relevant at 30th (given the extreme depth of 4e character builds as levels are gained).