Just look at the Cubs offensive statistics of their main players since the first of May (sorted by OPS; minimum 40 at bats; stats from Dave Pinto's Day-by-Day Database):

Player	Games	GS	AB	Runs	Hits	2B	3B	HR	RBI	BB	IBB	HBP	K	SB	CS	SH	SF	GDP	BA	OBA	SPct	OPS
Derrek Lee	26	26	97	15	31	6	0	5	14	16	2	1	23	0	0	0	0	1	0.32	0.421	0.536	0.957
Reed Johnson	22	13	63	11	20	6	1	3	15	4	0	0	7	1	0	0	1	1	0.317	0.353	0.587	0.940
Ryan Theriot	34	32	133	23	36	8	1	6	16	10	0	4	20	5	3	2	0	4	0.271	0.34	0.481	0.821
Bobby Scales	22	14	53	11	12	2	1	3	7	7	0	1	13	0	0	0	0	2	0.226	0.328	0.472	0.800
Milton Bradley	29	25	94	15	23	3	1	4	13	11	1	1	19	0	0	0	0	4	0.245	0.33	0.426	0.756
Kosuke Fukudome	29	25	92	16	23	6	1	1	7	20	1	1	19	3	1	1	1	1	0.25	0.386	0.37	0.756
Mike Fontenot	31	29	103	7	27	6	1	3	17	10	2	0	23	2	0	0	3	2	0.262	0.319	0.427	0.746
Geovany Soto	30	26	97	8	26	3	0	2	12	14	1	1	19	0	0	0	1	6	0.268	0.363	0.361	0.724
Micah Hoffpauir	28	16	71	6	18	5	0	2	9	6	0	0	18	0	0	0	0	2	0.254	0.312	0.408	0.720
Alfonso Soriano	33	33	145	18	30	8	0	7	13	10	2	1	40	3	0	0	1	1	0.207	0.261	0.407	0.668
Aaron Miles	21	13	57	9	12	5	0	0	2	4	1	0	9	3	0	1	0	1	0.211	0.262	0.298	0.560

That's some pretty pathetic offense there.

But there is one other stat to look at, and it's the only one that matters. The standings:

Central	W	L	Pct	GB
Milwaukee Brewers	33	25	0.569	--
Chicago Cubs	29	26	0.527	2.5
Cincinnati Reds	30	27	0.526	2.5
St. Louis Cardinals	31	28	0.525	2.5
Pittsburgh Pirates	26	32	0.448	7
Houston Astros	25	31	0.446	7

The Cubs are one game out of first in the loss column, the only one that matters. That the Cubs have played three fewer games than the Brewers is simply good luck due to the number of injuries the Cube have had. Hopefully, by the time they actually play these games, the team will be far more healthy on the offense.

This is the advantage of having a strong balance sheet. You can absorb more pain.