I hope you're right.
Maybe the $9 million is enough for Welker to gamble what will likely be many times that amount in bonus and guarantees as well as salary in a long term contract (assuming he does indeed want to be paid as a Top 5 WR.
Mankins wasn't willing to gamble and understandably sat out - they're under no obligation to play - and it's difficult to fault them for not wanting to risk injury and risk losing tens of millions of additional dollars
As much as I hope Welker won't sit out the first 10 games, if he does I can see it from his perspective.
It's not like he's been well compensated thus far - tough to fault a guy for seeking what the market will bear, and sitting out to avoid injury if a long-term contract is not forthcoming.
While you make a good point in regards to Welker's potential contract, the comparison to Mankins is much different.
Mankins is still a pretty young road grader with a tremendous upside and a long road ahead as a Patriot. He signed a 6 year deal here, and will hopefully continue to play at a high level for many yrs.
Welker probably only has 2-3 yrs left at such a high rate of production, and the team will obviously have to weigh their options. With Mankins, there really wasn't much difficulty in choosing--as long as they wanted to give him something 'fair' to what the better guards in the NFL were getting. The only choice was whether or not they viewed the position of guard itself as a 'need' for paying a larger money pact; not the actual player himself.
In your opening sentence you claim that there is a "gamble" for Welker to possibly make "many times" the guaranteed money on a longer term deal vs. the franchise tag...I respectfully disagree, at least in the aspect of him gambling away "many times" the overall guaranteed money. The tag nets him 9 1/2 million guaranteed this yr alone, he would be lucky to see another 9 million guaranteed in the entire life of the contract, which will probably be his last in the NFL, and that'd contract would be for another 2-3 yrs after that.
Even IF Welker gets a longer term deal (3 or 4 yrs), the guaranteed money will likely be in the high teens or early twenties at the most. He has the ability to make more than 50% of that this year alone, so the earning potential is just about the same for him no matter what. In all actuality, it may work out even better for him if the team trades him next yr, because he will then have made a guaranteed 10 million this yr, and then have the opportunity to sign another 2-3 yr deal with even more guaranteed money next yr with a new team.
Either way, Welker is going to get paid very nicely; and either way the overall salary and guaranteed money will be at least what the NEP would give him on a longer term deal this year (assuming that he is tagged for 2012, and then would play another 2-3 yrs of football here or elsewhere)...unless of course, he should suffer a career ending injury, and even then I am pretty sure that he will take out a nice insurance policy to protect him in that unlikelihood.
A strong possibility is that a longer term deal will get worked out by the middle of July, in which case all the tag would do would offer as an extension anyway. Another possibility is that Welker plays here this yr, makes a quick 10 million dollars, and then either backs down on his demands in February of next yr, or goes to another team via tag and trade. One way or another he will very likely be here in 2012.
And if he sits out and passes up the most guaranteed money in his entire career, at the age of 31-32, he's a major idiot. With a potential to make almost 10 million dollars this yr, it certainly seems as though he'd make more in the next 16 games than he did in the course of his entire 6-7 yr career. I can't see how any agent would give that kind of advice, especially for a guy who probably only has a very limited time to make money at this specific career.